4YG8

CRYSTAL STRUCTURE OF THE CHS5-CHS6 EXOMER CARGO ADAPTOR COMPLEX

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	BRCT domain	8046317	4000373	SCOP2 (2022-06-29)
A	SCOP2 Family	CHS5 fibronectin type III domain-like	8046318	4005016	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	BRCT domain-like	8093400	3000159	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Fibronectin type III	8093399	3002063	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	ChAPs N-terminal domain-like	8051935	3002076	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	TPR-like	8051936	3001345	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	fn3_8	e4yg8A1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: fn3_8	ECOD (1.6)
A	PTCB-BRCT	e4yg8A2	A: a/b three-layered sandwiches	X: BRCT domain (From Topology)	H: BRCT domain (From Topology)	T: BRCT domain	F: PTCB-BRCT	ECOD (1.6)
B	ChAPs_C	e4yg8B2	A: alpha superhelices	X: Repetitive alpha hairpins	H: ARM repeat (From Topology)	T: ARM repeat	F: ChAPs_C	ECOD (1.6)
B	ChAPs_N	e4yg8B1	A: a+b two layers	X: N-terminal domain of chitin biosynthesis protein CHS6 (From Topology)	H: N-terminal domain of chitin biosynthesis protein CHS6 (From Topology)	T: N-terminal domain of chitin biosynthesis protein CHS6	F: ChAPs_N	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF16893	Fibronectin type III domain (fn3_2)	Fibronectin type III domain	This fibronectin type III domain is found in fungal chitin biosynthesis protein CHS5 where, together with the neighbouring BRCT domain (Pfam:PF00533), it binds to the Arf1 GTPase [1].	Domain
A	PF00533	BRCA1 C Terminus (BRCT) domain (BRCT)	BRCA1 C Terminus (BRCT) domain	The BRCT domain is found predominantly in proteins involved in cell cycle checkpoint functions responsive to DNA damage. The BRCT domain of XRCC1 forms a homodimer in the crystal structure. This suggests that pairs of BRCT domains associate as homo- ...	The BRCT domain is found predominantly in proteins involved in cell cycle checkpoint functions responsive to DNA damage. The BRCT domain of XRCC1 forms a homodimer in the crystal structure. This suggests that pairs of BRCT domains associate as homo- or heterodimers. BRCT domains are often found as tandem-repeat pairs [2]. Structures of the BRCA1 BRCT domains revealed a basis for a widely utilised head-to-tail BRCT-BRCT oligomerisation mode [3]. This conserved tandem BRCT architecture facilitates formation of the canonical BRCT phospho-peptide interaction cleft at a groove between the BRCT domains. Disease associated missense and nonsense mutations in the BRCA1 BRCT domains disrupt peptide binding by directly occluding this peptide binding groove, or by disrupting key conserved BRCT core folding determinants [5].	Domain
B	PF09295	ChAPs (Chs5p-Arf1p-binding proteins) (ChAPs)	ChAPs (Chs5p-Arf1p-binding proteins)	-	Repeat

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Chitin biosynthesis protein CHS5	small GTPase binding protein binding binding enzyme binding GTPase binding protein dimerization activity	regulation of cellular process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process biological regulation primary metabolic process regulation of cellular process RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process regulation of biological process biological regulation primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process cellular process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process Golgi to plasma membrane transport cellular localization post-Golgi vesicle-mediated transport transport localization within membrane establishment of localization vesicle-mediated transport vesicle-mediated transport to the plasma membrane localization Golgi vesicle transport sexual reproduction cellular developmental process reproductive process cellular component assembly involved in morphogenesis cell wall organization or biogenesis cell development cell wall organization spore wall biogenesis developmental process involved in reproduction meiotic cell cycle process ascospore wall assembly cellular component biogenesis cellular component organization cellular anatomical entity morphogenesis cellular component assembly spore wall assembly sexual sporulation cell differentiation anatomical structure development cell cycle cellular component organization or biogenesis cell cycle process developmental process fungal-type cell wall organization cell wall assembly sexual sporulation resulting in formation of a cellular spore reproductive process in single-celled organism meiotic cell cycle ascospore wall biogenesis fungal-type cell wall assembly sporulation resulting in formation of a cellular spore anatomical structure morphogenesis ascospore formation fungal-type cell wall organization or biogenesis cell wall biogenesis anatomical structure formation involved in morphogenesis sporulation fungal-type cell wall biogenesis external encapsulating structure organization cytoskeleton-dependent cytokinesis mitotic cytokinesis cytokinesis establishment or maintenance of cell polarity mitotic cell cycle establishment of cell polarity mitotic cell cycle process cell division cellular bud site selection protein localization establishment of protein localization nitrogen compound transport protein transport cellular macromolecule localization macromolecule localization carbohydrate derivative catabolic process catabolic process carbohydrate derivative metabolic process chitin metabolic process aminoglycan catabolic process macromolecule catabolic process glucosamine-containing compound catabolic process amino sugar catabolic process aminoglycan metabolic process amino sugar metabolic process chitin catabolic process glucosamine-containing compound metabolic process conjugation with cellular fusion	membrane-bounded organelle protein-containing complex intracellular anatomical structure transport vesicle Golgi apparatus intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle trans-Golgi network transport vesicle cellular anatomical structure cytoplasmic vesicle organelle exomer complex membrane-bounded organelle protein-containing complex intracellular anatomical structure transport vesicle Golgi apparatus intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle trans-Golgi network transport vesicle cellular anatomical structure cytoplasmic vesicle organelle exomer complex clathrin-coated vesicle coated vesicle cytoplasm Golgi-associated vesicle vesicle membrane Golgi apparatus subcompartment organelle subcompartment trans-Golgi network cell projection mating projection cell tip mating projection tip cell pole plasma membrane bounded cell projection site of polarized growth cytosol
B	Chitin biosynthesis protein CHS6	-	Golgi to plasma membrane transport cellular localization post-Golgi vesicle-mediated transport transport localization within membrane establishment of localization vesicle-mediated transport vesicle-mediated transport to the plasma membrane localization cellular process Golgi vesicle transport amino sugar biosynthetic process carbohydrate derivative biosynthetic process chitin biosynthetic process Golgi to plasma membrane transport cellular localization post-Golgi vesicle-mediated transport transport localization within membrane establishment of localization vesicle-mediated transport vesicle-mediated transport to the plasma membrane localization cellular process Golgi vesicle transport amino sugar biosynthetic process carbohydrate derivative biosynthetic process chitin biosynthetic process carbohydrate derivative metabolic process chitin metabolic process macromolecule biosynthetic process glucosamine-containing compound biosynthetic process biosynthetic process aminoglycan metabolic process amino sugar metabolic process aminoglycan biosynthetic process metabolic process macromolecule metabolic process glucosamine-containing compound metabolic process protein localization establishment of protein localization nitrogen compound transport protein transport cellular macromolecule localization macromolecule localization	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle transport vesicle intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle trans-Golgi network transport vesicle cytoplasmic vesicle organelle clathrin-coated vesicle cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle transport vesicle intracellular vesicle intracellular membrane-bounded organelle endomembrane system intracellular organelle trans-Golgi network transport vesicle cytoplasmic vesicle organelle clathrin-coated vesicle coated vesicle Golgi-associated vesicle vesicle protein-containing complex Golgi apparatus exomer complex membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR003961	Fibronectin type III	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR001357	BRCT domain	Domain
A	IPR052827	Chitin Synthase Export/Cell Fusion Regulator	Family
A	IPR031669	Fibronectin type III domain, fungi	Domain
A	IPR031673	Chitin biosynthesis protein Chs5, N-terminal	Domain
A	IPR036420	BRCT domain superfamily	Homologous Superfamily
A	IPR036116	Fibronectin type III superfamily	Homologous Superfamily
B	IPR011990	Tetratricopeptide-like helical domain superfamily	Homologous Superfamily
B	IPR015374	Chs5p-Arf1p binding	Family

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.