4XQG

Crystal Structure of the Homospermidine Synthase (HSS) variant E237Q from Blastochloris viridis in Complex with NAD.

External Resource: Annotation

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

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Sacchrp_dh_C,Sacchrp_dh_NADP	e4xqgA1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: Sacchrp_dh_C,Sacchrp_dh_NADP	ECOD (1.6)
B	Sacchrp_dh_C,Sacchrp_dh_NADP	e4xqgB1	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: NAD(P)-binding Rossmann-fold domains	F: Sacchrp_dh_C,Sacchrp_dh_NADP	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
A	3.30.360.30	Alpha Beta	2-Layer Sandwich	Dihydrodipicolinate Reductase	domain 2	CATH (4.3.0)
B	3.40.50.720	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	NAD(P)-binding Rossmann-like Domain	CATH (4.3.0)
B	3.30.360.30	Alpha Beta	2-Layer Sandwich	Dihydrodipicolinate Reductase	domain 2	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B	PF16653	Saccharopine dehydrogenase C-terminal domain (Sacchrp_dh_C)	Saccharopine dehydrogenase C-terminal domain	This family comprises the C-terminal domain of saccharopine dehydrogenase. In some organisms this enzyme is found as a bifunctional polypeptide with lysine ketoglutarate reductase. The saccharopine dehydrogenase can also function as a saccharopine re ...	This family comprises the C-terminal domain of saccharopine dehydrogenase. In some organisms this enzyme is found as a bifunctional polypeptide with lysine ketoglutarate reductase. The saccharopine dehydrogenase can also function as a saccharopine reductase.	Domain
A, B	PF03435	Saccharopine dehydrogenase NADP binding domain (Sacchrp_dh_NADP)	Saccharopine dehydrogenase NADP binding domain	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B	Homospermidine synthase	homospermidine synthase (spermidine-specific) activity transferase activity transferase activity, transferring alkyl or aryl (other than methyl) groups catalytic activity homospermidine synthase activity	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B	IPR005097	Saccharopine dehydrogenase, NADP binding domain	Domain
A, B	IPR023181	Homospermidine synthase-like, C-terminal	Homologous Superfamily
A, B	IPR032095	Saccharopine dehydrogenase-like, C-terminal	Domain

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.