Annotations: 4LVR

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Calponin-homology domain CH-domain	8051994	3000264	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	PF18383	e4lvrA1	A: alpha bundles	X: CH domain-like	H: Calponin-homology domain-like (From Topology)	T: Calponin-homology domain-like	F: PF18383	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.10.418.70	Mainly Alpha	Orthogonal Bundle	Actin-binding Protein, T-fimbrin	domain 1	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF18383	Intraflagellar transport 81 calponin homology domain (IFT81_CH)	Intraflagellar transport 81 calponin homology domain	This is the N-terminal domain found in IFT81 proteins. Crystal structure analysis revealed that IFT81-N adopts the fold of a calponin homology (CH) domain with structural similarity to the kinetochore complex component NDC80 with microtubule (MT)-bin ...	This is the N-terminal domain found in IFT81 proteins. Crystal structure analysis revealed that IFT81-N adopts the fold of a calponin homology (CH) domain with structural similarity to the kinetochore complex component NDC80 with microtubule (MT)-binding properties. Functional analysis show that IFT74 and IFT81 form a tubulin-binding module required for ciliogenesis. It is suggested that IFT81-N binds the globular domain of tubulin to provide specificity, and IFT74-N recognizes the beta-tubulin tail to increase affinity [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Intraflagellar transport protein 81	cytoskeletal protein binding protein binding binding tubulin binding	organelle assembly plasma membrane bounded cell projection organization cell projection organization plasma membrane bounded cell projection assembly cellular component biogenesis cellular component organization organelle organization cellular component assembly cilium assembly cellular process cellular component organization or biogenesis cilium organization cell projection assembly cellular localization organelle assembly plasma membrane bounded cell projection organization cell projection organization plasma membrane bounded cell projection assembly cellular component biogenesis cellular component organization organelle organization cellular component assembly cilium assembly cellular process cellular component organization or biogenesis cilium organization cell projection assembly cellular localization transport localization establishment of localization in cell transport along microtubule intraciliary transport intraciliary transport involved in cilium assembly intracellular transport establishment of localization protein-containing complex localization microtubule-based transport cytoskeleton-dependent intracellular transport microtubule-based movement microtubule-based process	apical part of cell cellular anatomical entity membrane-bounded organelle cell projection organelle cilium motile cilium plasma membrane bounded cell projection intraciliary transport particle B protein-containing complex intraciliary transport particle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR043016	IFT81, N-terminal domain superfamily	Homologous Superfamily
A	IPR041146	IFT81, calponin homology domain	Domain
A	IPR029600	Intraflagellar transport protein 81	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 R01GM133198.