4DIX

Crystal structure of the Ig-PH domain of actin-binding protein SCAB1

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
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	SCAB Ig domain-like	8046017	4004825	SCOP2 (2022-06-29)
A	SCOP2 Family	SCAB PH domain-like	8092647	4007777	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	E set domains	8092648	3000070	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	PH domain-like	8092649	3000134	SCOP2 (2022-06-29)
B	SCOP2B Superfamily	PH domain-like	8092649	3000134	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	E set domains	8092648	3000070	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	PF17684	e4dixA1	A: beta barrels	X: PH domain-like	H: PH domain-like (From Topology)	T: PH domain-like	F: PF17684	ECOD (1.6)
A	PF16709	e4dixA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF16709	ECOD (1.6)
B	PF17684	e4dixB2	A: beta barrels	X: PH domain-like	H: PH domain-like (From Topology)	T: PH domain-like	F: PF17684	ECOD (1.6)
B	PF16709	e4dixB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PF16709	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.2700	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
A	2.30.29.140	Mainly Beta	Roll	PH-domain like		CATH (4.3.0)
B	2.60.40.2700	Mainly Beta	Sandwich	Immunoglobulin-like		CATH (4.3.0)
B	2.30.29.140	Mainly Beta	Roll	PH-domain like		CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF16709	Ig domain of plant-specific actin-binding protein (SCAB-Ig)	Ig domain of plant-specific actin-binding protein	This family is an Ig-like domain found on plant-specific actin-binding proteins or SCABs. SCAB proteins bind, bundle and stabilise actin filaments and regulate stomatal movement. The Ig-PH fusion domain is at the C-terminus. This domain is an Ig beta ...	This family is an Ig-like domain found on plant-specific actin-binding proteins or SCABs. SCAB proteins bind, bundle and stabilise actin filaments and regulate stomatal movement. The Ig-PH fusion domain is at the C-terminus. This domain is an Ig beta-sandwich fold consisting of two antiparallel beta-sheets built from strands beta1 and beta2 and strands beta3-beta6, respectively.	Domain
A, B	PF17684	PH domain of plant-specific actin-binding protein (SCAB-PH)	PH domain of plant-specific actin-binding protein	This family is a PH domain found on plant-specific actin-binding proteins or SCABs. SCAB proteins bind, bundle and stabilise actin filaments and regulate stomatal movement. The Ig-PH fusion domain is at the C-terminus. This domain adopts the PH fold, ...	This family is a PH domain found on plant-specific actin-binding proteins or SCABs. SCAB proteins bind, bundle and stabilise actin filaments and regulate stomatal movement. The Ig-PH fusion domain is at the C-terminus. This domain adopts the PH fold, of seven beta-strands, beta7-beta13 and two alpha-helices, alpha1 and alpha2 arranged into a beta-barrel. The canonical phosphoinositide-binding pocket of the classic PH domain is degenerate in this fused one, and the charge on the pocket suggest that the Ig-PH domain contains a non-canonical binding site for inositol phosphates [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Plectin-related protein	cytoskeletal protein binding actin binding protein binding binding	regulation of stomatal movement regulation of biological process regulation of cellular process stomatal movement biological regulation cellular process cellular component organization organelle organization actin cytoskeleton organization actin filament organization actin filament-based process cellular component organization or biogenesis supramolecular fiber organization cytoskeleton organization	intracellular anatomical structure cytoplasm cellular anatomical entity intracellular organelle cytoskeleton organelle intracellular non-membrane-bounded organelle non-membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR032009	Stomatal closure-related actin-binding protein, coiled-coil domain	Domain
A, B	IPR041144	Stomatal closure-related actin-binding protein, PH domain	Domain
A, B	IPR032012	Stomatal closure-related actin-binding protein, actin-binding domain	Domain
A, B	IPR039640	Stomatal closure-related actin-binding protein	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.