1AQ2

PHOSPHOENOLPYRUVATE CARBOXYKINASE

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Structure Motif: Primary M-CSA Annotation

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1aq2a1	Alpha and beta proteins (a/b)	PEP carboxykinase-like	PEP carboxykinase-like	PEP carboxykinase C-terminal domain	Phosphoenolpyruvate (PEP) carboxykinase (ATP-oxaloacetate carboxy-lyase)	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)
A	d1aq2a2	Alpha and beta proteins (a/b)	PEP carboxykinase N-terminal domain	PEP carboxykinase N-terminal domain	PEP carboxykinase N-terminal domain	Phosphoenolpyruvate (PEP) carboxykinase (ATP-oxaloacetate carboxy-lyase)	(Escherichia coli K-12 ) [TaxId: 83333 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	PEP carboxykinase N-terminal domain	8055992	3001788	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	PEPCK/HprK-like	8018030	3001670	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	PEPCK_ATP_C	e1aq2A1	A: a/b three-layered sandwiches	X: P-loop domains-like	H: P-loop domains-related	T: PEP carboxykinase catalytic C-terminal domain	F: PEPCK_ATP_C	ECOD (1.6)
A	PEPCK_ATP_N	e1aq2A2	A: a/b three-layered sandwiches	X: P-loop domains-like	H: PEP carboxykinase N-terminal domain (From Topology)	T: PEP carboxykinase N-terminal domain	F: PEPCK_ATP_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.449.10	Alpha Beta	3-Layer(aba) Sandwich	Phosphoenolpyruvate Carboxykinase	domain 1	CATH (4.3.0)
A	2.170.8.10	Mainly Beta	Beta Complex	Phosphoenolpyruvate Carboxykinase	domain 2	CATH (4.3.0)
A	3.90.228.20	Alpha Beta	Alpha-Beta Complex	Phosphoenolpyruvate Carboxykinase	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF01293	Phosphoenolpyruvate carboxykinase (PEPCK_ATP)	Phosphoenolpyruvate carboxykinase	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PHOSPHOENOLPYRUVATE CARBOXYKINASE	cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding anion binding adenyl nucleotide binding cation binding magnesium ion binding ion binding binding metal ion binding small molecule binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding purine nucleotide binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding calcium ion binding phosphoenolpyruvate carboxykinase activity carboxy-lyase activity lyase activity phosphoenolpyruvate carboxykinase (ATP) activity catalytic activity carbon-carbon lyase activity	monosaccharide metabolic process carbohydrate metabolic process small molecule biosynthetic process carbohydrate biosynthetic process hexose metabolic process primary metabolic process monosaccharide biosynthetic process gluconeogenesis hexose biosynthetic process biosynthetic process small molecule metabolic process metabolic process cellular process glucose metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008210	Phosphoenolpyruvate carboxykinase, N-terminal	Homologous Superfamily
A	IPR013035	Phosphoenolpyruvate carboxykinase, C-terminal	Homologous Superfamily
A	IPR001272	Phosphoenolpyruvate carboxykinase, ATP-utilising	Family
A	IPR015994	Phosphoenolpyruvate carboxykinase (ATP), conserved site	Conserved Site

Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage

Chains	Enzyme Name	Description	Catalytic Residues
A	phosphoenolpyruvate carboxykinase (ATP) M-CSA #51	Phosphoenolpyruvate carboxykinase (PEPCK) catalyses first committed (rate-limiting) step in hepatic gluconeogenesis, namely the reversible decarboxylation of oxaloacetate to phosphoenolpyruvate (PEP) and carbon dioxide. This reaction can occur using either ATP or GTP as a source of the phosphate. The ATP-utilising (EC:4.1.1.49, represented here) and GTP-utilising (EC:4.1.1.32) enzymes form two divergent subfamilies, which have little sequence similarity but which retain conserved active site residues. The reaction requires two divalent cations for activity, usually magnesium and manganese. One cation interacts with the enzyme at metal binding site 1 to elicit activation, while the second cation interacts at metal binding site 2 to serve as a metal-nucleotide substrate. In bacteria, fungi and plants, PEPCK is involved in the glyoxylate bypass, an alternative to the tricarboxylic acid cycle. PEPCK consists of an N-terminal and a catalytic C-terminal domain, with the active site and metal ions located in a cleft between them. Both domains have an alpha/beta topology that is partly similar to one another [PMID:15023367, PMID:8609605]. Substrate binding causes PEPCK to undergo a conformational change, which accelerates catalysis by forcing bulk solvent molecules out of the active site [PMID:15890557]. PCK uses an alpha/beta/alpha motif for nucleotide binding, this motif differing from other kinase domains.	Defined by 8 residues: ARG:A-65LYS:A-213HIS:A-232SER:A-250LYS:A-254THR:A-255ASP:A-269ARG:A-333 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 4.1.1.49 (PDB Primary Data) Search M-CSA Motif + EC 4.1.1.49

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.