rod

UniProt ID: Q9V9W7
Organism: Drosophila melanogaster
Review Status: COMPLETE
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Gene Description

rod (Rough deal) encodes the largest subunit of the Rod-Zw10-Zwilch (RZZ) complex, a ~2,100-residue KNTC1/ROD-family protein with N-terminal beta-propeller and extended alpha-solenoid regions. Rod is recruited to unattached kinetochores in prometaphase as part of the fibrous corona, where RZZ recruits Spindly-dynein-dynactin and Mad1-Mad2, enabling spindle assembly checkpoint signalling and accurate sister chromatid segregation; after microtubule attachment Rod streams off kinetochores along kinetochore microtubules and exchanges rapidly with a cytosolic pool, contributing to checkpoint silencing. rod mutants missegregate chromosomes and fail to arrest after spindle damage. Rod is also concentrated at the Golgi in spermatocytes and is needed for normal Golgi morphology, and binds GTP-bound Rab18 with Zw10.

Existing Annotations Review

GO Term Evidence Action Reason
GO:0000070 mitotic sister chromatid segregation
IBA
GO_REF:0000033
ACCEPT
Summary: Rod is required for accurate mitotic sister chromatid segregation.
Reason: rod mutants greatly increase chromatid missegregation; conserved RZZ function.
Supporting Evidence:
PMID:10523511
greatly increase the missegregation of sister chromatids during mitosis
GO:0000070 mitotic sister chromatid segregation
IMP
PMID:11590237
The ZW10 and Rough Deal checkpoint proteins function togethe...
ACCEPT
Summary: Rod is required for accurate mitotic sister chromatid segregation.
Reason: rod mutants greatly increase chromatid missegregation; conserved RZZ function.
Supporting Evidence:
PMID:10523511
greatly increase the missegregation of sister chromatids during mitosis
GO:0000776 kinetochore
IDA
PMID:10523511
The rough deal protein is a new kinetochore component requir...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0000776 kinetochore
IDA
PMID:11590237
The ZW10 and Rough Deal checkpoint proteins function togethe...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0000776 kinetochore
IDA
PMID:12686595
Zwilch, a new component of the ZW10/ROD complex required for...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0000776 kinetochore
IDA
PMID:14711415
In vivo dynamics of the rough deal checkpoint protein during...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0000776 kinetochore
IDA
PMID:15886105
Recruitment of Mad2 to the kinetochore requires the Rod/Zw10...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0000776 kinetochore
IDA
PMID:17576797
Spindly, a novel protein essential for silencing the spindle...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0000776 kinetochore
IDA
PMID:22685323
The Drosophila RZZ complex - roles in membrane trafficking a...
ACCEPT
Summary: Rod is a kinetochore (outer corona) component.
Reason: Repeatedly observed kinetochore localization.
Supporting Evidence:
PMID:10523511
localizing first to kinetochores in prometaphase, but moving to kinetochore microtubules at metaphase
PMID:14711415
We propose that the Rod complex is a major component of the fibrous corona
GO:0005515 protein binding
IPI
PMID:12686595
Zwilch, a new component of the ZW10/ROD complex required for...
REMOVE
Summary: Rod co-purifies with Zw10 and Zwilch.
Reason: Bare protein binding is uninformative and is captured by RZZ complex membership; removal does not imply the interaction is false.
Supporting Evidence:
PMID:12686595
We found that the complex contains an additional protein we name Zwilch
GO:0005737 cytoplasm
IBA
GO_REF:0000033
KEEP AS NON CORE
Summary: Rod exchanges with a soluble cytosolic pool.
Reason: Correct but general; GFP-Rod at kinetochores and spindle turns over rapidly with free cytosolic Rod, but the functional location is the kinetochore. No replacement applies, because kinetochore, kinetochore microtubule and spindle are not descendants of cytoplasm in GO, and are captured by their own rows.
Supporting Evidence:
PMID:14711415
kinetochore- and spindle-associated Rod rapidly turns over with free cytosolic Rod
GO:0005737 cytoplasm
IDA
PMID:15886105
Recruitment of Mad2 to the kinetochore requires the Rod/Zw10...
KEEP AS NON CORE
Summary: Rod exchanges with a soluble cytosolic pool.
Reason: Correct but general; GFP-Rod at kinetochores and spindle turns over rapidly with free cytosolic Rod, but the functional location is the kinetochore. No replacement applies, because kinetochore, kinetochore microtubule and spindle are not descendants of cytoplasm in GO, and are captured by their own rows.
Supporting Evidence:
PMID:14711415
kinetochore- and spindle-associated Rod rapidly turns over with free cytosolic Rod
GO:0005795 Golgi stack
IDA
PMID:22685323
The Drosophila RZZ complex - roles in membrane trafficking a...
KEEP AS NON CORE
Summary: Rod is concentrated at the Golgi in spermatocytes.
Reason: Observed localization reflecting a secondary Golgi-related role.
Supporting Evidence:
PMID:22685323
Rod is concentrated at the Golgi but not at the ER
GO:0005819 spindle
IDA
PMID:17576797
Spindly, a novel protein essential for silencing the spindle...
MODIFY
Summary: Rod associates with the spindle.
Reason: Correct but less specific; MODIFY to kinetochore microtubule, which rod already carries (IBA, IDA).
Proposed replacements: kinetochore microtubule
GO:0005828 kinetochore microtubule
IBA
GO_REF:0000033
ACCEPT
Summary: Rod streams along kinetochore microtubules after attachment.
Reason: Hallmark RZZ localization, observed in fixed and live imaging.
Supporting Evidence:
PMID:14711415
GFP-Rod robustly streams from kinetochores along microtubules
GO:0005828 kinetochore microtubule
IDA
PMID:10523511
The rough deal protein is a new kinetochore component requir...
ACCEPT
Summary: Rod streams along kinetochore microtubules after attachment.
Reason: Hallmark RZZ localization, observed in fixed and live imaging.
Supporting Evidence:
PMID:14711415
GFP-Rod robustly streams from kinetochores along microtubules
GO:0005828 kinetochore microtubule
IDA
PMID:11590237
The ZW10 and Rough Deal checkpoint proteins function togethe...
ACCEPT
Summary: Rod streams along kinetochore microtubules after attachment.
Reason: Hallmark RZZ localization, observed in fixed and live imaging.
Supporting Evidence:
PMID:14711415
GFP-Rod robustly streams from kinetochores along microtubules
GO:0005828 kinetochore microtubule
IDA
PMID:14711415
In vivo dynamics of the rough deal checkpoint protein during...
ACCEPT
Summary: Rod streams along kinetochore microtubules after attachment.
Reason: Hallmark RZZ localization, observed in fixed and live imaging.
Supporting Evidence:
PMID:14711415
GFP-Rod robustly streams from kinetochores along microtubules
GO:0005828 kinetochore microtubule
IDA
PMID:15886105
Recruitment of Mad2 to the kinetochore requires the Rod/Zw10...
ACCEPT
Summary: Rod streams along kinetochore microtubules after attachment.
Reason: Hallmark RZZ localization, observed in fixed and live imaging.
Supporting Evidence:
PMID:14711415
GFP-Rod robustly streams from kinetochores along microtubules
GO:0005828 kinetochore microtubule
IDA
PMID:22685323
The Drosophila RZZ complex - roles in membrane trafficking a...
ACCEPT
Summary: Rod streams along kinetochore microtubules after attachment.
Reason: Hallmark RZZ localization, observed in fixed and live imaging.
Supporting Evidence:
PMID:14711415
GFP-Rod robustly streams from kinetochores along microtubules
GO:0007030 Golgi organization
IMP
PMID:22685323
The Drosophila RZZ complex - roles in membrane trafficking a...
KEEP AS NON CORE
Summary: rod mutations affect Golgi morphology.
Reason: Experimentally supported but secondary role, not required for spermatocyte cytokinesis.
Supporting Evidence:
PMID:22685323
Mutations in rod also affect Golgi morphology
GO:0007094 mitotic spindle assembly checkpoint signaling
IBA
GO_REF:0000033
ACCEPT
Summary: Rod is required for spindle assembly checkpoint signalling.
Reason: Core function; rod cells fail to arrest upon spindle damage, rod(Z3) embryos lack the SAC.
Supporting Evidence:
PMID:11146659
Rough Deal (Rod) and Zeste-White 10 (Zw10) are required for the proper functioning of the metaphase checkpoint in flies
GO:0007094 mitotic spindle assembly checkpoint signaling
IMP
PMID:11146659
Rough deal and Zw10 are required for the metaphase checkpoin...
ACCEPT
Summary: Rod is required for spindle assembly checkpoint signalling.
Reason: Core function; rod cells fail to arrest upon spindle damage, rod(Z3) embryos lack the SAC.
Supporting Evidence:
PMID:11146659
Rough Deal (Rod) and Zeste-White 10 (Zw10) are required for the proper functioning of the metaphase checkpoint in flies
GO:0030071 regulation of mitotic metaphase/anaphase transition
IMP
PMID:25616898
A maternal effect rough deal mutation suggests that multiple...
ACCEPT
Summary: Rod regulates the metaphase/anaphase transition via the SAC.
Reason: The SAC acts by restraining anaphase onset; rod(Z3) embryos lacking kinetochore RZZ have no SAC.
Supporting Evidence:
PMID:25616898
Consequently, the embryos have no spindle assembly checkpoint (SAC)
GO:0031267 small GTPase binding
IBA
GO_REF:0000033
KEEP AS NON CORE
Summary: Rod binds GTP-bound Rab18.
Reason: Rab18 affinity chromatography retrieves Rod with Zw10; relevant to the membrane role, not the core kinetochore activity.
Supporting Evidence:
PMID:25453831
Antisera against two NRZ subunits confirmed the interaction with Rab18 and showed it to be GTP specific
GO:0031267 small GTPase binding
IPI
PMID:25453831
Toward a comprehensive map of the effectors of rab GTPases.
KEEP AS NON CORE
Summary: Rod binds GTP-bound Rab18.
Reason: Rab18 affinity chromatography retrieves Rod with Zw10; relevant to the membrane role, not the core kinetochore activity.
Supporting Evidence:
PMID:25453831
Antisera against two NRZ subunits confirmed the interaction with Rab18 and showed it to be GTP specific
GO:0034501 protein localization to kinetochore
IMP
PMID:16105886
Distinct mechanisms govern the localisation of Drosophila CL...
ACCEPT
Summary: Rod is needed for kinetochore recruitment of dynein-dependent factors.
Reason: RZZ is required for kinetochore localization of dynein/dynactin, Mad2 and (via dynein) CLIP-190.
Supporting Evidence:
PMID:16105886
This localisation depends on the dynein-dynactin complex and Lis1
PMID:15886105
Mad2, but not BubR1, Bub1, Bub3, or Mps1, requires Rod/Zw10 for its accumulation on unattached kinetochores
GO:0036063 acroblast
IDA
PMID:22685323
The Drosophila RZZ complex - roles in membrane trafficking a...
KEEP AS NON CORE
Summary: Rod localizes to the acroblast.
Reason: Golgi-derived structure in spermatids; consistent with Golgi association.
GO:0051233 spindle midzone
IDA
PMID:22685323
The Drosophila RZZ complex - roles in membrane trafficking a...
KEEP AS NON CORE
Summary: Rod observed at the spindle midzone.
Reason: Curator-observed localization in spermatocytes; not central.
GO:0051988 regulation of attachment of spindle microtubules to kinetochore
NAS
PMID:12686595
Zwilch, a new component of the ZW10/ROD complex required for...
KEEP AS NON CORE
Summary: RZZ influences kinetochore-microtubule attachment via dynein.
Reason: Author statement; indirect.
Supporting Evidence:
PMID:12686595
This complex recruits cytoplasmic dynein to the kinetochore and participates in the spindle checkpoint
GO:1903394 protein localization to kinetochore involved in kinetochore assembly
IBA
GO_REF:0000033
ACCEPT
Summary: Rod/RZZ recruits corona proteins to kinetochores.
Reason: Phylogenetic inference consistent with fly data showing RZZ-dependent recruitment of dynein and Mad2 to the outer kinetochore.
Supporting Evidence:
PMID:10523511
necessary for the recruitment of two known kinetochore components, Zw10 and cytoplasmic dynein
GO:1905818 regulation of chromosome separation
IMP
PMID:26859353
Gene Dosage Imbalance Contributes to Chromosomal Instability...
KEEP AS NON CORE
Summary: rod depletion used to induce chromosomal instability.
Reason: The study uses rod knockdown as a tool to induce CIN; consistent with SAC role but adds no mechanistic information. The cached abstract does not describe the rod experiment, so no supporting quote is given.
GO:1990423 RZZ complex
IBA
GO_REF:0000033
ACCEPT
Summary: Rod is the largest core subunit of RZZ.
Reason: Biochemically purified complex.
Supporting Evidence:
PMID:11590237
ROD and ZW10 are in fact physically associated
PMID:12686595
We found that the complex contains an additional protein we name Zwilch
GO:1990423 RZZ complex
IDA
PMID:12686595
Zwilch, a new component of the ZW10/ROD complex required for...
ACCEPT
Summary: Rod is the largest core subunit of RZZ.
Reason: Biochemically purified complex.
Supporting Evidence:
PMID:11590237
ROD and ZW10 are in fact physically associated
PMID:12686595
We found that the complex contains an additional protein we name Zwilch
GO:1990423 RZZ complex
IPI
PMID:12686595
Zwilch, a new component of the ZW10/ROD complex required for...
ACCEPT
Summary: Rod is the largest core subunit of RZZ.
Reason: Biochemically purified complex.
Supporting Evidence:
PMID:11590237
ROD and ZW10 are in fact physically associated
PMID:12686595
We found that the complex contains an additional protein we name Zwilch
GO:1990423 RZZ complex
IPI
PMID:25616898
A maternal effect rough deal mutation suggests that multiple...
ACCEPT
Summary: Rod is the largest core subunit of RZZ.
Reason: Biochemically purified complex.
Supporting Evidence:
PMID:11590237
ROD and ZW10 are in fact physically associated
PMID:12686595
We found that the complex contains an additional protein we name Zwilch

Core Functions

As the scaffold subunit of RZZ at the kinetochore corona, Rod contributes to recruitment of Spindly-dynein- dynactin and Mad1-Mad2 to unattached kinetochores, enabling spindle assembly checkpoint signalling and accurate chromosome segregation.

Supporting Evidence:
  • PMID:15886105
    Rod/Zw10 thus contributes to checkpoint activation by promoting Mad2 recruitment and to checkpoint inactivation by recruiting dynein/dynactin
  • PMID:10523511
    necessary for the recruitment of two known kinetochore components, Zw10 and cytoplasmic dynein
  • file:DROME/rod/rod-deep-research-falcon.md
    no catalytic reaction or transported substrate is established for Rod

References

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Deep Research

Falcon

(rod-deep-research-falcon.md)

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FlyBase

(rod-deep-research-flybase.md)
FlyBase gene description for rod (DROME) FlyBase

FlyBase gene description for rod (DROME)

rough deal (rod) encodes the major subunit of the Rod-Zw10-Zwilch (RZZ) complex. RZZ is an essential component of the outer kinetochore during mitosis. RZZ helps monitor and correct kinetochore-microtubule attachments during prometaphase, and consequently it regulates mitotic progression.

πŸ“š Additional Documentation

Notes

(rod-notes.md)

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