1LCB

LACTOBACILLUS CASEI THYMIDYLATE SYNTHASE TERNARY COMPLEX WITH DTMP AND H2FOLATE

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	d1lcba_	Alpha and beta proteins (a+b)	Thymidylate synthase/dCMP hydroxymethylase	Thymidylate synthase/dCMP hydroxymethylase	Thymidylate synthase/dCMP hydroxymethylase	Thymidylate synthase	(Lacticaseibacillus casei ) [TaxId: 1582 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Thymidylate synthase/dCMP hydroxymethylase	8036195	3000544	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	Thymidylat_synt	e1lcbA1	A: a+b two layers	X: Thymidylate synthase/dCMP hydroxymethylase (From Topology)	H: Thymidylate synthase/dCMP hydroxymethylase (From Topology)	T: Thymidylate synthase/dCMP hydroxymethylase	F: Thymidylat_synt	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.30.572.10	Alpha Beta	2-Layer Sandwich	Thymidylate Synthase	Chain A	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00303	Thymidylate synthase (Thymidylat_synt)	Thymidylate synthase	This is a family of proteins that are flavin-dependent thymidylate synthases.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	THYMIDYLATE SYNTHASE	transferase activity, transferring one-carbon groups transferase activity methyltransferase activity thymidylate synthase activity 5,10-methylenetetrahydrofolate-dependent methyltransferase activity catalytic activity	methylation metabolic process pyrimidine deoxyribonucleotide metabolic process deoxyribose phosphate biosynthetic process nucleotide biosynthetic process carbohydrate derivative metabolic process pyrimidine nucleotide metabolic process pyrimidine deoxyribonucleoside monophosphate metabolic process nucleobase-containing compound metabolic process deoxyribonucleotide biosynthetic process deoxyribonucleotide metabolic process pyrimidine deoxyribonucleotide biosynthetic process nucleobase-containing small molecule metabolic process dTMP metabolic process methylation metabolic process pyrimidine deoxyribonucleotide metabolic process deoxyribose phosphate biosynthetic process nucleotide biosynthetic process carbohydrate derivative metabolic process pyrimidine nucleotide metabolic process pyrimidine deoxyribonucleoside monophosphate metabolic process nucleobase-containing compound metabolic process deoxyribonucleotide biosynthetic process deoxyribonucleotide metabolic process pyrimidine deoxyribonucleotide biosynthetic process nucleobase-containing small molecule metabolic process dTMP metabolic process phosphate-containing compound metabolic process deoxyribonucleoside monophosphate biosynthetic process dTMP biosynthetic process small molecule metabolic process pyrimidine deoxyribonucleoside monophosphate biosynthetic process pyrimidine-containing compound biosynthetic process nucleoside monophosphate metabolic process phosphorus metabolic process nucleoside phosphate metabolic process carbohydrate derivative biosynthetic process pyrimidine nucleoside monophosphate metabolic process pyrimidine-containing compound metabolic process cellular metabolic process 2'-deoxyribonucleotide metabolic process 2'-deoxyribonucleotide biosynthetic process primary metabolic process nucleotide metabolic process deoxyribose phosphate metabolic process nucleobase-containing compound biosynthetic process deoxyribonucleoside monophosphate metabolic process nucleoside monophosphate biosynthetic process biosynthetic process organophosphate metabolic process organophosphate biosynthetic process nucleoside phosphate biosynthetic process cellular process pyrimidine nucleoside monophosphate biosynthetic process pyrimidine nucleotide biosynthetic process pyrimidine deoxyribonucleoside triphosphate biosynthetic process dTTP biosynthetic process pyrimidine deoxyribonucleoside triphosphate metabolic process pyrimidine nucleoside triphosphate biosynthetic process pyrimidine nucleoside triphosphate metabolic process dTTP metabolic process nucleoside triphosphate biosynthetic process nucleoside triphosphate metabolic process	intracellular anatomical structure cytoplasm cellular anatomical entity cytosol

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR045097	Thymidylate synthase/dCMP hydroxymethylase	Family
A	IPR020940	Thymidylate synthase, active site	Active Site
A	IPR036926	Thymidylate synthase/dCMP hydroxymethylase superfamily	Homologous Superfamily
A	IPR023451	Thymidylate synthase/dCMP hydroxymethylase domain	Domain
A	IPR000398	Thymidylate synthase	Family

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

Chains	Enzyme Name	Description	Catalytic Residues
A	thymidylate synthase M-CSA #31	Thymidylate synthase (TS) is an essential enzyme for the de novo synthesis of thymidine 5'-monophosphate (dTMP) via the addition of a methyl group to 2'-deoxyuridine 5'monophosphate (dUMP) from folate. TS is a highly conserved enzyme. dTMP is a nucleotide required for DNA synthesis, and therefore, it is an important drug target, especially for anticancer and antineoplastic drugs. TS also plays a role in regulating tissue folate levels. TS is a bisubstrate enzyme in which the cofactor, CH2 H4 folate, serves as both the one-carbon donor to the substrate dUMP and, subsequently, as the reductant. A one-carbon unit and hydride are transferred from different sites on the cofactor, and large contributions to the catalytic power of TS are achieved through the dynamic alignment and realignment of reactants at these chemical steps.	Defined by 6 residues: GLU:A-60TRP:A-82TYR:A-146CYS:A-198ARG:A-218ASP:A-221 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 2.1.1.45 (PDB Primary Data) Search M-CSA Motif + EC 2.1.1.45

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.