Annotations: 9XVV

Maltoheptaose-bound Arabidopsis ISA2-ISA1-ISA1 heterotrimer

External Resource: Annotation

Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B [auth C]	PF21156	Isoamylase 1-3, C-terminal (ISOA1-3_C)	Isoamylase 1-3, C-terminal	Isoamylases (ISOAs) are starch debranching enzymes, including ISOA1, ISOA2 and ISOA3. ISOA1-2 are known to form a large complex and being involved in the biosynthesis and crystallization of starch. ISOA3 is involved in starch catabolism and removes d ...	Isoamylases (ISOAs) are starch debranching enzymes, including ISOA1, ISOA2 and ISOA3. ISOA1-2 are known to form a large complex and being involved in the biosynthesis and crystallization of starch. ISOA3 is involved in starch catabolism and removes different branches than ISA1-ISA2, namely short chains that prevent amylopectin crystallization [2]. This is the C-terminal beta-sandwich domain from ISOA1-3. In ISOA1, this domain is involved in dimerisation of homodimers and suggests a similar interaction to form ISOA1-ISOA2 heterodimers [1].	Domain
B [auth C]	PF02922	Carbohydrate-binding module 48 (Isoamylase N-terminal domain) (CBM_48)	Carbohydrate-binding module 48 (Isoamylase N-terminal domain)	This domain is found in a range of enzymes that act on branched substrates - isoamylase, pullulanase and branching enzyme. This family also contains the beta subunit of 5' AMP activated kinase.	Domain
B [auth C]	PF00128	Alpha amylase, catalytic domain (Alpha-amylase)	Alpha amylase, catalytic domain	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, a ...	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, and a carboxyl-terminal Greek key beta-barrel domain.	Domain
A, C [auth B]	PF21156	Isoamylase 1-3, C-terminal (ISOA1-3_C)	Isoamylase 1-3, C-terminal	Isoamylases (ISOAs) are starch debranching enzymes, including ISOA1, ISOA2 and ISOA3. ISOA1-2 are known to form a large complex and being involved in the biosynthesis and crystallization of starch. ISOA3 is involved in starch catabolism and removes d ...	Isoamylases (ISOAs) are starch debranching enzymes, including ISOA1, ISOA2 and ISOA3. ISOA1-2 are known to form a large complex and being involved in the biosynthesis and crystallization of starch. ISOA3 is involved in starch catabolism and removes different branches than ISA1-ISA2, namely short chains that prevent amylopectin crystallization [2]. This is the C-terminal beta-sandwich domain from ISOA1-3. In ISOA1, this domain is involved in dimerisation of homodimers and suggests a similar interaction to form ISOA1-ISOA2 heterodimers [1].	Domain
A, C [auth B]	PF02922	Carbohydrate-binding module 48 (Isoamylase N-terminal domain) (CBM_48)	Carbohydrate-binding module 48 (Isoamylase N-terminal domain)	This domain is found in a range of enzymes that act on branched substrates - isoamylase, pullulanase and branching enzyme. This family also contains the beta subunit of 5' AMP activated kinase.	Domain
A, C [auth B]	PF00128	Alpha amylase, catalytic domain (Alpha-amylase)	Alpha amylase, catalytic domain	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, a ...	Alpha amylase is classified as family 13 of the glycosyl hydrolases. The structure is an 8 stranded alpha/beta barrel containing the active site, interrupted by a ~70 a.a. calcium-binding domain protruding between beta strand 3 and alpha helix 3, and a carboxyl-terminal Greek key beta-barrel domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth C]	Isoamylase 2, chloroplastic	hydrolase activity, acting on glycosyl bonds hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity isoamylase activity	carbohydrate metabolic process catabolic process glucan catabolic process carbohydrate catabolic process primary metabolic process macromolecule catabolic process polysaccharide metabolic process glucan metabolic process starch metabolic process polysaccharide catabolic process starch catabolic process metabolic process cellular process macromolecule metabolic process carbohydrate metabolic process catabolic process glucan catabolic process carbohydrate catabolic process primary metabolic process macromolecule catabolic process polysaccharide metabolic process glucan metabolic process starch metabolic process polysaccharide catabolic process starch catabolic process metabolic process cellular process macromolecule metabolic process glucan biosynthetic process polysaccharide biosynthetic process carbohydrate biosynthetic process macromolecule biosynthetic process biosynthetic process starch biosynthetic process carbohydrate derivative biosynthetic process amylopectin metabolic process carbohydrate derivative metabolic process amylopectin biosynthetic process	membrane-bounded organelle intracellular organelle cellular anatomical structure intracellular anatomical structure plastid organelle cytoplasm intracellular membrane-bounded organelle chloroplast protein-containing complex catalytic complex isoamylase complex
A, C [auth B]	Isoamylase 1, chloroplastic	hydrolase activity, acting on glycosyl bonds hydrolase activity, hydrolyzing O-glycosyl compounds hydrolase activity catalytic activity isoamylase activity	carbohydrate metabolic process catabolic process glucan catabolic process carbohydrate catabolic process primary metabolic process macromolecule catabolic process polysaccharide metabolic process glucan metabolic process starch metabolic process polysaccharide catabolic process starch catabolic process metabolic process cellular process macromolecule metabolic process carbohydrate metabolic process catabolic process glucan catabolic process carbohydrate catabolic process primary metabolic process macromolecule catabolic process polysaccharide metabolic process glucan metabolic process starch metabolic process polysaccharide catabolic process starch catabolic process metabolic process cellular process macromolecule metabolic process glucan biosynthetic process polysaccharide biosynthetic process carbohydrate biosynthetic process macromolecule biosynthetic process biosynthetic process starch biosynthetic process carbohydrate derivative biosynthetic process amylopectin metabolic process carbohydrate derivative metabolic process amylopectin biosynthetic process	membrane-bounded organelle protein-containing complex intracellular anatomical structure plastid catalytic complex isoamylase complex intracellular membrane-bounded organelle chloroplast isoamylase complex intracellular organelle cellular anatomical structure organelle cytoplasm chloroplast

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B [auth C]	IPR048650	Isoamylase 1-3-like, C-terminal	Domain
B [auth C]	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
B [auth C]	IPR044096	Isoamylase 2, catalytic domain	Domain
B [auth C]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B [auth C]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
B [auth C]	IPR006047	Glycosyl hydrolase family 13, catalytic domain	Domain
B [auth C]	IPR044505	Glycogen debranching enzyme GlgX/isoamylase, N-terminal Early set domain	Domain
B [auth C]	IPR013780	Glycosyl hydrolase, all-beta	Homologous Superfamily
B [auth C]	IPR004193	Glycoside hydrolase, family 13, N-terminal	Domain
A, C [auth B]	IPR048650	Isoamylase 1-3-like, C-terminal	Domain
A, C [auth B]	IPR017853	Glycoside hydrolase superfamily	Homologous Superfamily
A, C [auth B]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, C [auth B]	IPR014756	Immunoglobulin E-set	Homologous Superfamily
A, C [auth B]	IPR006047	Glycosyl hydrolase family 13, catalytic domain	Domain
A, C [auth B]	IPR044505	Glycogen debranching enzyme GlgX/isoamylase, N-terminal Early set domain	Domain
A, C [auth B]	IPR013780	Glycosyl hydrolase, all-beta	Homologous Superfamily
A, C [auth B]	IPR004193	Glycoside hydrolase, family 13, N-terminal	Domain

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.

9XVV | pdb_00009xvv

Maltoheptaose-bound Arabidopsis ISA2-ISA1-ISA1 heterotrimer

External Resource: Annotation

Protein Family Annotation Pfam Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage