id: Q9Y3D7
gene_symbol: PAM16
product_type: PROTEIN
status: COMPLETE
taxon:
  id: NCBITaxon:9606
  label: Homo sapiens
description: 'PAM16 encodes MAGMAS/TIM16, a matrix-facing regulatory J-like cochaperone/adaptor subunit of the TIM23-associated
  PAM import motor. It forms a Pam18/Tim14 subcomplex, recruits and restrains Pam18 activity, and tunes mtHsp70-driven
  import of presequence-containing proteins into the mitochondrial matrix.'
existing_annotations:
- term:
    id: GO:0005744
    label: TIM23 mitochondrial import inner membrane translocase complex
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: PAM16 is functionally coupled to TIM23, but its complex membership is more precisely the PAM
      import motor rather than the TIM23 channel/core translocase.
    action: MODIFY
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Use the PAM complex term for PAM16 complex membership; TIM23 is the coupled translocase.
    proposed_replacement_terms:
    - id: GO:0001405
      label: PAM complex, Tim23 associated import motor
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0030150
    label: protein import into mitochondrial matrix
  evidence_type: IBA
  original_reference_id: GO_REF:0000033
  review:
    summary: Correct and core. PAM16 regulates the PAM motor that powers TIM23-mediated matrix import.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0001405
    label: PAM complex, Tim23 associated import motor
  evidence_type: IEA
  original_reference_id: GO_REF:0000117
  review:
    summary: Correct and core. PAM16/MAGMAS is a regulatory subunit of the TIM23-associated PAM motor.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005743
    label: mitochondrial inner membrane
  evidence_type: IEA
  original_reference_id: GO_REF:0000044
  review:
    summary: Correct. PAM16 is a peripheral component associated with the matrix side of the mitochondrial
      inner membrane.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16/MAGMAS is localized to **mitochondria** and described as a **peripheral membrane
        protein** associated with the TIM23/PAM machinery at the **inner membrane, matrix-facing side**. One
        source explicitly notes that it does **not extend into the intermembrane space (IMS)**, consistent
        with a matrix-side role in regulating the mtHsp70 motor. (riva2018ajourneythrough pages 11-15,
        sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005744
    label: TIM23 mitochondrial import inner membrane translocase complex
  evidence_type: IEA
  original_reference_id: GO_REF:0000002
  review:
    summary: PAM16 is functionally coupled to TIM23, but its complex membership is more precisely the PAM
      import motor rather than the TIM23 channel/core translocase.
    action: MODIFY
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Use the PAM complex term for PAM16 complex membership; TIM23 is the coupled translocase.
    proposed_replacement_terms:
    - id: GO:0001405
      label: PAM complex, Tim23 associated import motor
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0030150
    label: protein import into mitochondrial matrix
  evidence_type: IEA
  original_reference_id: GO_REF:0000002
  review:
    summary: Correct and core. PAM16 regulates the PAM motor that powers TIM23-mediated matrix import.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:23263864
  review:
    summary: Protein binding is too generic for PAM16. The informative role is a regulatory
      adaptor/cochaperone function within the Pam16-Pam18/PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Replace generic protein-binding capture with PAM complex membership and adaptor/regulatory
      cochaperone activity where supported.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 is not an enzyme catalyzing a metabolic reaction nor a transporter substrate-binding
        channel.** Instead, it functions as a **regulatory cochaperone/adaptor** within the import motor. It is
        described as a **J-like** protein (Hsp40/J-domain superfamily-like) that regulates the activity and positioning
        of the true J-domain cochaperone **Pam18/Tim14** (metazoan functional ortholog often discussed as DNAJC19/Pam18
        in the PAM motor context) which stimulates mtHsp70 ATPase activity. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5, riva2018ajourneythrough pages 11-15)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:25416956
  review:
    summary: Protein binding is too generic for PAM16. The informative role is a regulatory
      adaptor/cochaperone function within the Pam16-Pam18/PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Replace generic protein-binding capture with PAM complex membership and adaptor/regulatory
      cochaperone activity where supported.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 is not an enzyme catalyzing a metabolic reaction nor a transporter substrate-binding
        channel.** Instead, it functions as a **regulatory cochaperone/adaptor** within the import motor. It is
        described as a **J-like** protein (Hsp40/J-domain superfamily-like) that regulates the activity and positioning
        of the true J-domain cochaperone **Pam18/Tim14** (metazoan functional ortholog often discussed as DNAJC19/Pam18
        in the PAM motor context) which stimulates mtHsp70 ATPase activity. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5, riva2018ajourneythrough pages 11-15)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:32296183
  review:
    summary: Protein binding is too generic for PAM16. The informative role is a regulatory
      adaptor/cochaperone function within the Pam16-Pam18/PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Replace generic protein-binding capture with PAM complex membership and adaptor/regulatory
      cochaperone activity where supported.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 is not an enzyme catalyzing a metabolic reaction nor a transporter substrate-binding
        channel.** Instead, it functions as a **regulatory cochaperone/adaptor** within the import motor. It is
        described as a **J-like** protein (Hsp40/J-domain superfamily-like) that regulates the activity and positioning
        of the true J-domain cochaperone **Pam18/Tim14** (metazoan functional ortholog often discussed as DNAJC19/Pam18
        in the PAM motor context) which stimulates mtHsp70 ATPase activity. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5, riva2018ajourneythrough pages 11-15)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:33961781
  review:
    summary: Protein binding is too generic for PAM16. The informative role is a regulatory
      adaptor/cochaperone function within the Pam16-Pam18/PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Replace generic protein-binding capture with PAM complex membership and adaptor/regulatory
      cochaperone activity where supported.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 is not an enzyme catalyzing a metabolic reaction nor a transporter substrate-binding
        channel.** Instead, it functions as a **regulatory cochaperone/adaptor** within the import motor. It is
        described as a **J-like** protein (Hsp40/J-domain superfamily-like) that regulates the activity and positioning
        of the true J-domain cochaperone **Pam18/Tim14** (metazoan functional ortholog often discussed as DNAJC19/Pam18
        in the PAM motor context) which stimulates mtHsp70 ATPase activity. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5, riva2018ajourneythrough pages 11-15)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0005743
    label: mitochondrial inner membrane
  evidence_type: NAS
  original_reference_id: PMID:10339406
  review:
    summary: Correct. PAM16 is a peripheral component associated with the matrix side of the mitochondrial
      inner membrane.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16/MAGMAS is localized to **mitochondria** and described as a **peripheral membrane
        protein** associated with the TIM23/PAM machinery at the **inner membrane, matrix-facing side**. One
        source explicitly notes that it does **not extend into the intermembrane space (IMS)**, consistent
        with a matrix-side role in regulating the mtHsp70 motor. (riva2018ajourneythrough pages 11-15,
        sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005744
    label: TIM23 mitochondrial import inner membrane translocase complex
  evidence_type: NAS
  original_reference_id: PMID:10339406
  review:
    summary: PAM16 is functionally coupled to TIM23, but its complex membership is more precisely the PAM
      import motor rather than the TIM23 channel/core translocase.
    action: MODIFY
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Use the PAM complex term for PAM16 complex membership; TIM23 is the coupled translocase.
    proposed_replacement_terms:
    - id: GO:0001405
      label: PAM complex, Tim23 associated import motor
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0006886
    label: intracellular protein transport
  evidence_type: NAS
  original_reference_id: PMID:10339406
  review:
    summary: Correct pathway family but too broad. PAM16 specifically supports TIM23/PAM-mediated
      mitochondrial matrix protein import.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Prefer protein import into mitochondrial matrix and PAM complex terms over generic intracellular
      protein transport.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005739
    label: mitochondrion
  evidence_type: IDA
  original_reference_id: GO_REF:0000052
  review:
    summary: Correct but broad. PAM16 is specifically associated with the matrix-facing side of the
      mitochondrial inner membrane in the PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Prefer matrix side of mitochondrial inner membrane and PAM complex annotations over generic
      mitochondrion.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16/MAGMAS is localized to **mitochondria** and described as a **peripheral membrane
        protein** associated with the TIM23/PAM machinery at the **inner membrane, matrix-facing side**. One
        source explicitly notes that it does **not extend into the intermembrane space (IMS)**, consistent
        with a matrix-side role in regulating the mtHsp70 motor. (riva2018ajourneythrough pages 11-15,
        sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005739
    label: mitochondrion
  evidence_type: HTP
  original_reference_id: PMID:34800366
  review:
    summary: Correct but broad. PAM16 is specifically associated with the matrix-facing side of the
      mitochondrial inner membrane in the PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Prefer matrix side of mitochondrial inner membrane and PAM complex annotations over generic
      mitochondrion.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16/MAGMAS is localized to **mitochondria** and described as a **peripheral membrane
        protein** associated with the TIM23/PAM machinery at the **inner membrane, matrix-facing side**. One
        source explicitly notes that it does **not extend into the intermembrane space (IMS)**, consistent
        with a matrix-side role in regulating the mtHsp70 motor. (riva2018ajourneythrough pages 11-15,
        sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0099617
    label: matrix side of mitochondrial inner membrane
  evidence_type: IDA
  original_reference_id: PMID:20053669
  review:
    summary: Correct. PAM16 localizes to the matrix-facing side of the mitochondrial inner membrane.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16/MAGMAS is localized to **mitochondria** and described as a **peripheral membrane
        protein** associated with the TIM23/PAM machinery at the **inner membrane, matrix-facing side**. One
        source explicitly notes that it does **not extend into the intermembrane space (IMS)**, consistent
        with a matrix-side role in regulating the mtHsp70 motor. (riva2018ajourneythrough pages 11-15,
        sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0001405
    label: PAM complex, Tim23 associated import motor
  evidence_type: ISS
  original_reference_id: GO_REF:0000024
  review:
    summary: Correct and core. PAM16/MAGMAS is a regulatory subunit of the TIM23-associated PAM motor.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0001503
    label: ossification
  evidence_type: IMP
  original_reference_id: PMID:24786642
  review:
    summary: Keep as non-core. Human PAM16/MAGMAS disease data support a skeletal dysplasia/ossification
      phenotype, but the evolved core function is mitochondrial protein import motor regulation.
    action: KEEP_AS_NON_CORE
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Ossification is a downstream organismal phenotype of MAGMAS impairment, not the core molecular
      function of PAM16.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Disease/phenotype links | PAM16 has recognized disease links, including **autosomal recessive
        spondylometaphyseal dysplasia, Megarbane type** in disease databases. Literature summarized in retrieved
        sources also links **MAGMAS overexpression** to neoplasia, including **prostate cancer**, **pituitary adenomas**,
        and anti-apoptotic/chemoresistance phenotypes. Open Targets also lists associations to neurodegenerative
        disease/Parkinson disease, but these are weaker database associations than the skeletal dysplasia link.
        | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesof pages 12-14, zhao2023mitochondrialskeletaldisorders
        pages 8-11, OpenTargets Search: -PAM16,TIMM16,MAGMAS) | Open Targets platform search context; Zhao 2023
        dissertation; Riva 2018 |'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 (Q9Y3D7; MAGMAS/TIM16/TIMM16)** is a mitochondrial, inner-membrane-associated (matrix-facing)
        **regulatory subunit of the TIM23 presequence import motor (PAM complex)**. Its defining molecular feature
        is a **degenerate J-like domain lacking the HPD motif**, consistent with a function in **forming a heterodimer
        with Pam18 and modulating Pam18’s stimulation of mtHsp70 ATPase activity**, thereby tuning ATP-dependent
        protein translocation into the mitochondrial matrix. Disease relevance includes database-supported association
        with **autosomal recessive spondylometaphyseal dysplasia (Megarbane type)** and literature-supported roles
        in tumor cell survival/chemoresistance with reported overexpression frequencies in prostate cancer and pituitary
        adenomas. (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof
        pages 4-5, OpenTargets Search: -PAM16,TIMM16,MAGMAS)'
- term:
    id: GO:0001405
    label: PAM complex, Tim23 associated import motor
  evidence_type: IGI
  original_reference_id: PMID:20053669
  review:
    summary: Correct and core. PAM16/MAGMAS is a regulatory subunit of the TIM23-associated PAM motor.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:19564938
  review:
    summary: Protein binding is too generic for PAM16. The informative role is a regulatory
      adaptor/cochaperone function within the Pam16-Pam18/PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Replace generic protein-binding capture with PAM complex membership and adaptor/regulatory
      cochaperone activity where supported.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 is not an enzyme catalyzing a metabolic reaction nor a transporter substrate-binding
        channel.** Instead, it functions as a **regulatory cochaperone/adaptor** within the import motor. It is
        described as a **J-like** protein (Hsp40/J-domain superfamily-like) that regulates the activity and positioning
        of the true J-domain cochaperone **Pam18/Tim14** (metazoan functional ortholog often discussed as DNAJC19/Pam18
        in the PAM motor context) which stimulates mtHsp70 ATPase activity. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5, riva2018ajourneythrough pages 11-15)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0005515
    label: protein binding
  evidence_type: IPI
  original_reference_id: PMID:20053669
  review:
    summary: Protein binding is too generic for PAM16. The informative role is a regulatory
      adaptor/cochaperone function within the Pam16-Pam18/PAM import motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Replace generic protein-binding capture with PAM complex membership and adaptor/regulatory
      cochaperone activity where supported.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '**PAM16 is not an enzyme catalyzing a metabolic reaction nor a transporter substrate-binding
        channel.** Instead, it functions as a **regulatory cochaperone/adaptor** within the import motor. It is
        described as a **J-like** protein (Hsp40/J-domain superfamily-like) that regulates the activity and positioning
        of the true J-domain cochaperone **Pam18/Tim14** (metazoan functional ortholog often discussed as DNAJC19/Pam18
        in the PAM motor context) which stimulates mtHsp70 ATPase activity. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5, riva2018ajourneythrough pages 11-15)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0005759
    label: mitochondrial matrix
  evidence_type: IDA
  original_reference_id: PMID:20053669
  review:
    summary: Correct. PAM16 acts at the matrix-facing side of the inner membrane and does not extend into the
      IMS.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16/MAGMAS is localized to **mitochondria** and described as a **peripheral membrane
        protein** associated with the TIM23/PAM machinery at the **inner membrane, matrix-facing side**. One
        source explicitly notes that it does **not extend into the intermembrane space (IMS)**, consistent
        with a matrix-side role in regulating the mtHsp70 motor. (riva2018ajourneythrough pages 11-15,
        sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0030150
    label: protein import into mitochondrial matrix
  evidence_type: IGI
  original_reference_id: PMID:20053669
  review:
    summary: Correct and core. PAM16 regulates the PAM motor that powers TIM23-mediated matrix import.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the
        cytosol, and imported into mitochondria. The **TIM23 complex** (inner membrane presequence
        translocase) mediates import of presequence-containing proteins; for matrix translocation, TIM23
        couples to the **PAM (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase
        cycle** to pull precursor polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5,
        sinha2017thecomplexitiesof pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0032780
    label: negative regulation of ATP-dependent activity
  evidence_type: IDA
  original_reference_id: PMID:19564938
  review:
    summary: Correct and mechanistically informative. PAM16 restrains Pam18-mediated stimulation of mtHsp70
      ATPase activity in the import motor.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: 'A recurring mechanistic interpretation is that Pam16/MAGMAS functions antagonistically to
        Pam18: it is required for correct association of the motor with the translocon and **inhibits Pam18-mediated
        stimulation of mtHsp70 ATPase activity**, thus tuning the import motor’s activity. (riva2018ajourneythrough
        pages 11-15, jain2025investigatingmitochondrialpresequence pages 15-17)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0032780
    label: negative regulation of ATP-dependent activity
  evidence_type: IDA
  original_reference_id: PMID:20053669
  review:
    summary: Correct and mechanistically informative. PAM16 restrains Pam18-mediated stimulation of mtHsp70
      ATPase activity in the import motor.
    action: ACCEPT
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: 'A recurring mechanistic interpretation is that Pam16/MAGMAS functions antagonistically to
        Pam18: it is required for correct association of the motor with the translocon and **inhibits Pam18-mediated
        stimulation of mtHsp70 ATPase activity**, thus tuning the import motor’s activity. (riva2018ajourneythrough
        pages 11-15, jain2025investigatingmitochondrialpresequence pages 15-17)'
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: '| Mechanistic role | PAM16 is primarily a **regulatory cochaperone/adaptor**, not an enzyme
        or transporter substrate-binding transporter itself. It forms a stable subcomplex with Pam18 and **recruits/controls
        Pam18 at the import channel**, thereby **modulating Pam18-driven stimulation of mtHsp70 ATPase activity**
        and fine-tuning the ATP-dependent import motor. It is described as a **negative regulator/antagonist** of
        Pam18’s stimulatory effect on mtHsp70. | (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa
        pages 4-5, jain2025investigatingmitochondrialpresequence pages 15-17, sinha2017thecomplexitiesof pages 4-5)
        | Riva 2018; Sinha 2017; Jain 2025 thesis, https://doi.org/10.53846/goediss-11596 |'
- term:
    id: GO:0032991
    label: protein-containing complex
  evidence_type: IDA
  original_reference_id: PMID:19564938
  review:
    summary: Correct but too generic. The specific protein-containing complex is the TIM23-associated PAM
      motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Use PAM complex rather than the generic protein-containing complex term.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0032991
    label: protein-containing complex
  evidence_type: IDA
  original_reference_id: PMID:20053669
  review:
    summary: Correct but too generic. The specific protein-containing complex is the TIM23-associated PAM
      motor.
    action: MARK_AS_OVER_ANNOTATED
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    reason: Use PAM complex rather than the generic protein-containing complex term.
    supported_by:
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: The literature and database evidence summarized here consistently refers to **human
        PAM16** as **MAGMAS/TIM16/TIMM16**, a small mitochondrial protein (~125 aa; ~13 kDa) that is part of
        the **TIM23-associated presequence import motor (PAM complex)**. This matches the UniProt description
        for Q9Y3D7 (mitochondrial import inner membrane translocase subunit TIM16 / PAM16 family), including
        the hallmark **J-like domain** and functional role in mitochondrial protein import.
        (riva2018ajourneythrough pages 11-15, riva2018ajourneythrough pages 8-11, sinha2017thecomplexitiesofa
        pages 4-5)
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
- term:
    id: GO:0030674
    label: protein-macromolecule adaptor activity
  evidence_type: IDA
  original_reference_id: PMID:20053669
  review:
    summary: New annotation. PAM16 functions as a regulatory adaptor/cochaperone that forms a
      Magmas-DnaJC19/Pam18 subcomplex, tethers the J-protein component to the translocon, and restrains
      Pam18-stimulated mtHsp70 ATPase activity.
    action: NEW
    reason: PAM16 has a specific adaptor/cochaperone role in the PAM motor that is more informative than
      generic protein binding and is not present in GOA.
    supported_by:
    - reference_id: PMID:20053669
      supporting_text: Moreover, Magmas interacts with yeast Pam18 as well as human DnaJC19 (ortholog of yeast
        Pam18) both in vivo and in vitro conditions to form a heterodimeric subcomplex.
    - reference_id: PMID:20053669
      supporting_text: Our results are consistent with the existence of stable interaction between Magmas and
        DnaJC19 that plays a crucial role in tethering of DnaJC19 at the translocon and perhaps regulating
        human import motor activity.
    - reference_id: PMID:19564938
      supporting_text: A similar effect was observed using human Tim16/Pam16s, which inhibited the increase in
        the ATPase activity of mtHsp70 (obtained due to the presence of yTim14/Pam18) by almost 50%. The
        latter result indicates that hTim16/Pam16s can replace its yeast Tim16/Pam18s homologue, in vitro, and
        can act as a negative regulator of yTim14/Pam18.
    - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
      supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
        motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
        **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
        regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
        (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
    additional_reference_ids:
    - file:human/PAM16/PAM16-deep-research-falcon.md
    - PMID:19564938
references:
- id: GO_REF:0000002
  title: Gene Ontology annotation through association of InterPro records with GO terms
  findings: []
- id: GO_REF:0000024
  title: Manual transfer of experimentally-verified manual GO annotation data to orthologs by curator judgment
    of sequence similarity
  findings: []
- id: GO_REF:0000033
  title: Annotation inferences using phylogenetic trees
  findings: []
- id: GO_REF:0000044
  title: Gene Ontology annotation based on UniProtKB/Swiss-Prot Subcellular Location vocabulary mapping,
    accompanied by conservative changes to GO terms applied by UniProt
  findings: []
- id: GO_REF:0000052
  title: Gene Ontology annotation based on curation of immunofluorescence data
  findings: []
- id: GO_REF:0000117
  title: Electronic Gene Ontology annotations created by ARBA machine learning models
  findings: []
- id: PMID:10339406
  title: Genetic and structural characterization of the human mitochondrial inner membrane translocase.
  findings: []
- id: PMID:19564938
  title: 'The mitochondrial protein translocation motor: structural conservation between the human and yeast Tim14/Pam18-Tim16/Pam16
    co-chaperones.'
  findings: []
- id: PMID:20053669
  title: Role of Magmas in protein transport and human mitochondria biogenesis.
  findings: []
- id: PMID:23263864
  title: Methylation-controlled J-protein MCJ acts in the import of proteins into human mitochondria.
  findings: []
- id: PMID:24786642
  title: The impairment of MAGMAS function in human is responsible for a severe skeletal dysplasia.
  findings: []
- id: PMID:25416956
  title: A proteome-scale map of the human interactome network.
  findings: []
- id: PMID:32296183
  title: A reference map of the human binary protein interactome.
  findings: []
- id: PMID:33961781
  title: Dual proteome-scale networks reveal cell-specific remodeling of the human interactome.
  findings: []
- id: PMID:34800366
  title: Quantitative high-confidence human mitochondrial proteome and its dynamics in cellular context.
  findings: []
- id: file:human/PAM16/PAM16-deep-research-falcon.md
  title: Falcon deep research report for human PAM16
  findings: []
core_functions:
- description: PAM16 is the matrix-facing regulatory J-like cochaperone/adaptor subunit of the PAM complex
    that forms a subcomplex with Pam18/Tim14, recruits and restrains Pam18 activity, and tunes mtHsp70-powered
    import of presequence-containing proteins into the mitochondrial matrix.
  supported_by:
  - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
    supporting_text: Most mitochondrial matrix proteins are encoded in the nucleus, translated in the cytosol,
      and imported into mitochondria. The **TIM23 complex** (inner membrane presequence translocase) mediates
      import of presequence-containing proteins; for matrix translocation, TIM23 couples to the **PAM
      (presequence translocase-associated motor)**, which uses an **mtHsp70 ATPase cycle** to pull precursor
      polypeptides into the matrix. (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages
      4-5)
  - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
    supporting_text: PAM16 (MAGMAS/TIM16/TIMM16) is an essential subunit of the **TIM23-associated PAM
      motor**. Mechanistically, it forms a stable subcomplex with Pam18/Tim14 and is described as (i)
      **recruiting Pam18** to the import channel and (ii) **controlling Pam18 activity**, thereby indirectly
      regulating mtHsp70’s ATP-driven pulling activity during translocation into the matrix.
      (sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages 4-5)
  - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
    supporting_text: 'A recurring mechanistic interpretation is that Pam16/MAGMAS functions antagonistically to
      Pam18: it is required for correct association of the motor with the translocon and **inhibits Pam18-mediated
      stimulation of mtHsp70 ATPase activity**, thus tuning the import motor’s activity. (riva2018ajourneythrough
      pages 11-15, jain2025investigatingmitochondrialpresequence pages 15-17)'
  - reference_id: file:human/PAM16/PAM16-deep-research-falcon.md
    supporting_text: '**PAM16 (Q9Y3D7; MAGMAS/TIM16/TIMM16)** is a mitochondrial, inner-membrane-associated (matrix-facing)
      **regulatory subunit of the TIM23 presequence import motor (PAM complex)**. Its defining molecular feature
      is a **degenerate J-like domain lacking the HPD motif**, consistent with a function in **forming a heterodimer
      with Pam18 and modulating Pam18’s stimulation of mtHsp70 ATPase activity**, thereby tuning ATP-dependent protein
      translocation into the mitochondrial matrix. Disease relevance includes database-supported association with
      **autosomal recessive spondylometaphyseal dysplasia (Megarbane type)** and literature-supported roles in tumor
      cell survival/chemoresistance with reported overexpression frequencies in prostate cancer and pituitary adenomas.
      (riva2018ajourneythrough pages 11-15, sinha2017thecomplexitiesofa pages 4-5, sinha2017thecomplexitiesof pages
      4-5, OpenTargets Search: -PAM16,TIMM16,MAGMAS)'
  molecular_function:
    id: GO:0030674
    label: protein-macromolecule adaptor activity
  directly_involved_in:
  - id: GO:0030150
    label: protein import into mitochondrial matrix
  locations:
  - id: GO:0099617
    label: matrix side of mitochondrial inner membrane
  - id: GO:0005743
    label: mitochondrial inner membrane
  in_complex:
    id: GO:0001405
    label: PAM complex, Tim23 associated import motor
proposed_new_terms: []
suggested_questions:
- question: Which human PAM16 surfaces are required for Pam18 recruitment versus inhibition of
    Pam18-stimulated mtHsp70 ATPase activity?
  experts: []
- question: How do skeletal dysplasia variants alter PAM16 stability, Pam18 binding, and matrix import flux in
    patient-relevant cells?
  experts: []
suggested_experiments:
- hypothesis: PAM16 disease variants impair matrix import by destabilizing the Pam16-Pam18 regulatory
    subcomplex.
  description: Measure Pam18 binding, PAM/TIM23 association, mtHsp70 ATPase regulation, and matrix-import
    reporter flux after rescue of PAM16-null human cells with wild-type and disease-variant PAM16.
- hypothesis: PAM16 overexpression phenotypes in cancer models derive from altered PAM motor activity rather
    than a separate enzymatic function.
  description: Compare acute PAM16 knockdown or overexpression with Pam18-interface mutants for precursor
    import, mitochondrial proteostasis, apoptosis sensitivity, and respiratory function.