Annotations: 1PKN

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1pkna1	All beta proteins	PK beta-barrel domain-like	PK beta-barrel domain-like	Pyruvate kinase beta-barrel domain	Pyruvate kinase (PK)	rabbit (Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
A	d1pkna2	Alpha and beta proteins (a/b)	TIM beta/alpha-barrel	Phosphoenolpyruvate/pyruvate domain	Pyruvate kinase	Pyruvate kinase, N-terminal domain	rabbit (Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)
A	d1pkna3	Alpha and beta proteins (a/b)	Pyruvate kinase C-terminal domain-like	PK C-terminal domain-like	Pyruvate kinase, C-terminal domain	Pyruvate kinase, C-terminal domain	rabbit (Oryctolagus cuniculus ) [TaxId: 9986 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Phosphoenolpyruvate/pyruvate domain	8043639	3000510	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	PK beta-barrel domain-like	8042524	3001296	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	PK C-terminal domain-like	8044402	3000442	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Phosphoenolpyruvate/pyruvate domain	8043639	3000510	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	PK_2nd	e1pknA4	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: PK beta-barrel domain-like	F: PK_2nd	ECOD (1.6)
A	PK_1st	e1pknA3	A: a/b barrels	X: TIM beta/alpha-barrel	H: TIM barrels (From Topology)	T: TIM barrels	F: PK_1st	ECOD (1.6)
A	PK_C	e1pknA1	A: a/b three-layered sandwiches	X: PK C-terminal domain-like (From Topology)	H: PK C-terminal domain-like (From Topology)	T: PK C-terminal domain-like	F: PK_C	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.1380.20	Alpha Beta	3-Layer(aba) Sandwich	Pyruvate Kinase	Chain: A, domain 1	CATH (4.3.0)
A	3.20.20.60	Alpha Beta	Alpha-Beta Barrel	TIM Barrel	Phosphoenolpyruvate-binding domains	CATH (4.3.0)
A	2.40.33.10	Mainly Beta	Beta Barrel	M1 Pyruvate Kinase	Domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00224	Pyruvate kinase, barrel domain (PK)	Pyruvate kinase, barrel domain	This is the barrel domain of pyruvate kinases. This domain represents the beta/alpha barrel and the small beta-barrel domain inserted within it. The active site is found in a cleft between the two domains [1,2,3,4].	Domain
A	PF02887	Pyruvate kinase, alpha/beta domain (PK_C)	Pyruvate kinase, alpha/beta domain	Pyruvate kinase catalyses the final step in glycolysis, the conversion of phosphoenolpyruvate to pyruvate with concomitant phosphorylation of ADP to ATP [1,2]. The structure of several pyruvate kinases from various organisms have been determined [2, ...	Pyruvate kinase catalyses the final step in glycolysis, the conversion of phosphoenolpyruvate to pyruvate with concomitant phosphorylation of ADP to ATP [1,2]. The structure of several pyruvate kinases from various organisms have been determined [2, 3,4]. The protein comprises three-four domains: a small N-terminal helical domain (absent in bacterial PK), a beta/alpha barrel domain, a beta-barrel domain (inserted within the beta/alpha-barrel domain), and a 3-layer alpha/beta/alpha sandwich domain (represented in this entry). This domain is at the C-terminal of pyruvate kinases and contains the FBP (fructose 1,6-bisphosphate) binding site [2,4,5].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	PYRUVATE KINASE	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 organic cyclic compound binding anion 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 organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding potassium ion binding alkali metal ion binding RNA binding nucleic acid binding mRNA binding pyruvate kinase activity transferase activity catalytic activity phosphotransferase activity, alcohol group as acceptor transferase activity, transferring phosphorus-containing groups protein tyrosine kinase activity catalytic activity, acting on a protein kinase activity protein kinase activity	regulation of cellular process cellular biosynthetic process positive regulation of protein metabolic process organonitrogen compound biosynthetic process positive regulation of biological process positive regulation of translation positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression positive regulation of metabolic process organic substance metabolic process positive regulation of cytoplasmic translation positive regulation of biosynthetic process organic substance biosynthetic process regulation of cellular process cellular biosynthetic process positive regulation of protein metabolic process organonitrogen compound biosynthetic process positive regulation of biological process positive regulation of translation positive regulation of cellular metabolic process positive regulation of macromolecule biosynthetic process regulation of primary metabolic process post-transcriptional regulation of gene expression positive regulation of metabolic process organic substance metabolic process positive regulation of cytoplasmic translation positive regulation of biosynthetic process organic substance biosynthetic process positive regulation of macromolecule metabolic process protein metabolic process positive regulation of cellular process regulation of biosynthetic process regulation of biological process organonitrogen compound metabolic process cellular metabolic process regulation of protein metabolic process biological regulation regulation of cellular metabolic process primary metabolic process regulation of macromolecule metabolic process gene expression translation macromolecule biosynthetic process regulation of cellular biosynthetic process regulation of gene expression biosynthetic process positive regulation of gene expression regulation of translation cytoplasmic translation regulation of macromolecule biosynthetic process metabolic process cellular process macromolecule metabolic process regulation of cytoplasmic translation regulation of metabolic process positive regulation of cellular biosynthetic process multicellular organismal process regulation of sprouting angiogenesis regulation of developmental process angiogenesis regulation of vasculature development positive regulation of developmental process multicellular organism development tube morphogenesis anatomical structure development positive regulation of sprouting angiogenesis regulation of multicellular organismal process regulation of anatomical structure morphogenesis blood vessel development system development developmental process regulation of multicellular organismal development blood vessel morphogenesis tube development positive regulation of angiogenesis sprouting angiogenesis vasculature development circulatory system development anatomical structure morphogenesis positive regulation of vasculature development regulation of angiogenesis anatomical structure formation involved in morphogenesis positive regulation of multicellular organismal process phosphorylation phosphate-containing compound metabolic process phosphorus metabolic process	membrane-bounded organelle intracellular organelle intracellular anatomical structure organelle nucleus intracellular membrane-bounded organelle cellular anatomical entity rough endoplasmic reticulum endoplasmic reticulum cytoplasm endomembrane system

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR015795	Pyruvate kinase, C-terminal	Domain
A	IPR015813	Pyruvate/Phosphoenolpyruvate kinase-like domain superfamily	Homologous Superfamily
A	IPR011037	Pyruvate kinase-like, insert domain superfamily	Homologous Superfamily
A	IPR015806	Pyruvate kinase, insert domain superfamily	Homologous Superfamily
A	IPR036918	Pyruvate kinase, C-terminal domain superfamily	Homologous Superfamily
A	IPR001697	Pyruvate kinase	Family
A	IPR018209	Pyruvate kinase, active site	Active Site
A	IPR040442	Pyruvate kinase-like domain superfamily	Homologous Superfamily
A	IPR015793	Pyruvate kinase, barrel	Domain

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

Chains	Enzyme Name	Description	Catalytic Residues
A	pyruvate kinase M-CSA #326	Pyruvate kinase catalyses the final step of glycolysis and is allosterically regulated by fructose-1,6-bisphosphate. It requires two equivalents divalent cation, one of which binds to the enzyme as a complex with the nucleotide substrate, as well as activation by K+. As opposed to mammalian pyruvate kinase, the bacterial enzyme works in a K+ independent manner. The enzyme is also known to catalyse a variety of side reactions, including the decarboxylation of oxalacetate, the enolisation of pyruvate, ATP-dependent phosphorylation of alpha-hydroxy or alpha-thio carboxylates, ATP- and bicarbonate-dependent phosphorylations of fluoride and of hydroxylamine and to also function as an ATP- and bicarbonate-dependent ATPase. These side activities reflect the capacity of the active site to labilise the gamma-phosphate of ATP or to stabilise the enolate of pyruvate [PMID:9308890]. There are four isozymes of pyruvate kinase in mammals (L, R, M1, M2) encoded by two different genes: PKLR and PKM. The L and R isozymes are generated from the PKLR by differential splicing of RNA; the M1 and M2 forms are produced from the PKM gene by differential splicing. L type is major isozyme in the liver, R is found in red cells, M1 is the main form in muscle, heart and brain, and M2 is found in early fetal tissues as well as in most cancer cells. This entry represents the PKM gene products.	Defined by 4 residues: ARG:A-72ARG:A-119LYS:A-269THR:A-327 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 2.7.1.40 (PDB Primary Data) Search M-CSA Motif + EC 2.7.1.40

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.