DYNLT2B

UniProt ID: A0A9L0SWY1
Organism: Equus caballus
Review Status: IN PROGRESS
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Gene Description

DYNLT2B-family protein containing a conserved Tctex-type light-chain region. The selected 245-residue horse sequence includes a long N-terminal extension and lacks the C-terminal strand present in the structurally characterized human DYNLT2B fold, leaving assembly into a functional dynein-2 complex unresolved.

References

file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md
DYNLT2B: horse–human sequence comparison
file:human/DYNLT2B/DYNLT2B-uniprot.txt
UniProt record for human DYNLT2B

External Prediction Reviews

These computational predictions are reviewed separately from the GOA annotation set used for this review. The assessments below are from this project and do not constitute official GO annotations or endorsement by GO/UniProt. They are not included in the existing annotation review above.

ProtNLM2 External predictions

View prediction review YAML Β· DYNLT2B-protnlm-predictions-review.yaml Β· Review status: COMPLETE

The ten ProtNLM predictions match well-supported functions or localizations of intact mammalian DYNLT2B, but their transfer to this exact extended and C-terminally truncated horse protein remains unresolved.

Source documents: genes/HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md Β· genes/human/DYNLT2B/DYNLT2B-uniprot.txt Β· projects/PROTNLM_EVALUATION/mammal-benchmark/horse40-predictions.csv

Review score: 2 = concordant with evidence; 1 = uncertain; 0 = discordant with evidence. This is an assessment score, not a model probability.

GO:0097546 ciliary base GO_CC
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Human ciliary-base targeting depends on microtubules and WDR60 association; conserved internal sequence does not demonstrate that the truncated horse fold can make those interactions. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25830415: "Tctex1d2 associates with Wdr34, Wdr60, and other subunits of Dync1 and Dync2 and colocalizes with Wdr60 to microtubule organizing centers during interphase, the mitotic spindle poles during cell division, and the base of the cilium in ciliated cells."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0045505 dynein intermediate chain binding GO_MF
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Intermediate-chain binding is experimentally established for the intact human heterodimer, but the selected horse protein lacks almost the entire terminal beta-strand of that fold. A direct interaction assay or a corrected protein model is needed to transfer this molecular function. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:29742051: "Utilizing the visible immunoprecipitation assay, we demonstrated the interaction modes among the dynein-2 subunits, including previously undefined interactions, such as that between WDR60 and the TCTEX1D2-DYNLT1/DYNLT3 dimer. The dynein-2 complex can be divided into three subcomplexes, namely DYNC2H1-DYNC2LI1, WDR34-DYNLL1/DYNLL2-DYNLRB1/DYNLRB2, and WDR60-TCTEX1D2-DYNLT1/DYNLT3."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0000922 spindle pole GO_CC
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: The human spindle-pole observation is specific to cycling cells. Neither conservation of a partial light-chain domain nor ciliary function establishes the same localization for the extended/truncated horse protein. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25830415: "Tctex1d2 associates with Wdr34, Wdr60, and other subunits of Dync1 and Dync2 and colocalizes with Wdr60 to microtubule organizing centers during interphase, the mitotic spindle poles during cell division, and the base of the cilium in ciliated cells."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0035721 intraciliary retrograde transport GO_BP
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Human knockout studies establish participation in retrograde IFT, but the selected horse protein has an unresolved structural truncation. This is not a claim that the normal horse ortholog lacks an evolutionarily conserved transport role. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:29742051: "We established cell lines lacking WDR60 or TCTEX1D2, both of which are dynein-2-specific subunits encoded by ciliopathy-causing genes, and found that both WDR60-knockout (KO) and TCTEX1D2-KO cells show defects in retrograde ciliary protein trafficking, with WDR60-KO cells demonstrating more severe defects probably due to failed assembly of the dynein-2 complex."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:1905799 regulation of intraciliary retrograde transport GO_BP
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Human loss of TCTEX1D2 perturbs IFT motor stability and transport. The selected horse model cannot yet be assumed to assemble into that regulatory complex. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:26044572: "Loss of TCTEX1D2 impairs retrograde intraflagellar transport (IFT) in humans and the protist Chlamydomonas, accompanied by destabilization of the retrograde IFT dynein motor. We thus define TCTEX1D2 as an integral component of the evolutionarily conserved retrograde IFT machinery."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0060271 cilium assembly GO_BP
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Human depletion affects ciliogenesis, whereas phenotype strength varies with experimental context. Correctness for the selected horse protein depends on whether its altered termini still permit an intact light-chain fold and complex assembly. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25830415: "Tctex1d2 and Wdr60 localize to the base of the cilium and their depletion causes defects in ciliogenesis."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0005813 centrosome GO_CC
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Centrosomal localization is observed for human TCTEX1D2, but no direct localization or compensating structural evidence is available for the selected horse protein model. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25830415: "Tctex1d2 associates with Wdr34, Wdr60, and other subunits of Dync1 and Dync2 and colocalizes with Wdr60 to microtubule organizing centers during interphase, the mitotic spindle poles during cell division, and the base of the cilium in ciliated cells."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0005930 axoneme GO_CC
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: The human axonemal signal came from overexpressed tagged protein; mouse sperm experiments add tissue-specific axonemal biology but are not a horse localization assay. The exact protein-model defect makes transfer additionally uncertain. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25830415: "overexpression of LAP(EGFP-TEV-S-Peptide)-Tctex1d2 led to the localization of LAP-Tctex1d2 to the ciliary axoneme (Fig. 3I), similar to what had been observed with Wdr60 overexpression.4"
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:0031021 interphase microtubule organizing center GO_CC
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: Human interphase microtubule-organizing-center localization is supported, but the corresponding interaction and localization of the extended/truncated horse form remain unresolved. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25830415: "Tctex1d2 associates with Wdr34, Wdr60, and other subunits of Dync1 and Dync2 and colocalizes with Wdr60 to microtubule organizing centers during interphase, the mitotic spindle poles during cell division, and the base of the cilium in ciliated cells."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""
GO:1902017 regulation of cilium assembly GO_BP
UNC β€” Uncertain Review score: 1/2
Prediction method: ProtNLM2 Β· Version: UniProt API snapshot 2026-09-08
Review rationale: An intact dynein-2 light chain can regulate ciliary assembly/homeostasis. The selected horse sequence lacks a structured terminal segment, so its ability to exert that complex-dependent role is not established. Global alignment covers 90.14% of the human reference but only 52.24% of the horse protein; human residues 129–142 are absent, including most of the 128–140 beta-strand observed in PDB 8RGI. The model-input sequence at prediction time and training membership are unknown.
Supporting Evidence:
  • PMID:25205765: "We show that the proteins encoded by the ciliopathy genes WDR34 and WDR60 are bona fide dynein-2 intermediate chains and are both required for dynein-2 function. In addition, we identify TCTEX1D2 as a unique dynein-2 light chain that is itself required for cilia function."
  • file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md: "The horse sequence A0A9L0SWY1 (245 residues) aligns to human Q8WW35 (142 residues) with 91.41% identity across 128 paired residues. Paired coverage is 90.14% of the human sequence and 52.24% of the horse sequence. ... - STRAND: human [128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140] DSLFCVVAAFGCF β†’ horse [245, None, None, None, None, None, None, None, None, None, None, None, None] K------------."
  • file:human/DYNLT2B/DYNLT2B-uniprot.txt: "FT STRAND 128..140 FT /evidence="ECO:0007829|PDB:8RGI""

πŸ“š Additional Documentation

Notes

(DYNLT2B-notes.md)

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Bioinformatics Results

(RESULTS.md)

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πŸ“„ View Raw YAML

id: A0A9L0SWY1
gene_symbol: DYNLT2B
product_type: PROTEIN
status: IN_PROGRESS
taxon:
  id: NCBITaxon:9796
  label: Equus caballus
description: DYNLT2B-family protein containing a conserved Tctex-type light-chain region. The selected 245-residue
  horse sequence includes a long N-terminal extension and lacks the C-terminal strand present in the structurally
  characterized human DYNLT2B fold, leaving assembly into a functional dynein-2 complex unresolved.
references:
- id: file:HORSE/DYNLT2B/DYNLT2B-bioinformatics/RESULTS.md
  title: "DYNLT2B: horse\u2013human sequence comparison"
  findings: []
- id: file:human/DYNLT2B/DYNLT2B-uniprot.txt
  title: UniProt record for human DYNLT2B
  findings: []