Annotations: 1TDJ

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1tdja1	Alpha and beta proteins (a/b)	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Tryptophan synthase beta subunit-like PLP-dependent enzymes	Threonine deaminase	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)
A	d1tdja2	Alpha and beta proteins (a+b)	Ferredoxin-like	ACT-like	Allosteric threonine deaminase C-terminal domain	Allosteric threonine deaminase C-terminal domain	(Escherichia coli ) [TaxId: 562 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2 Family	Allosteric threonine deaminase C-terminal domain	8023132	4001266	SCOP2 (2022-06-29)
A	SCOP2 Family	Allosteric threonine deaminase C-terminal domain	8023133	4001266	SCOP2 (2022-06-29)
A	SCOP2 Family	Tryptophan synthase beta subunit-like PLP-dependent enzymes	8020618	4000798	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	ACT-like	8035512	3000006	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	ACT-like	8035513	3000006	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Tryptophan synthase beta subunit-like PLP-dependent enzymes	8032998	3001427	SCOP2 (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	PF00585	e1tdjA1	A: a+b two layers	X: Alpha-beta plaits	H: ACT-like (From Topology)	T: ACT-like	F: PF00585	ECOD (1.6)
A	F_UNCLASSIFIED	e1tdjA4	A: a/b three-layered sandwiches	X: Rossmann-like	H: Tryptophan synthase beta subunit-like PLP-dependent enzymes (From Topology)	T: Tryptophan synthase beta subunit-like PLP-dependent enzymes	F: F_UNCLASSIFIED	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	3.40.50.1100	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold		CATH (4.3.0)
A	3.40.1020.10	Alpha Beta	3-Layer(aba) Sandwich	Biosynthetic Threonine Deaminase	domain 3	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00291	Pyridoxal-phosphate dependent enzyme (PALP)	Pyridoxal-phosphate dependent enzyme	-	Family
A	PF00585	C-terminal regulatory domain of Threonine dehydratase (Thr_dehydrat_C)	C-terminal regulatory domain of Threonine dehydratase	Threonine dehydratases Pfam:PF00291 all contain a carboxy terminal region. This region may have a regulatory role. Some members contain two copies of this region. This family is homologous to the Pfam:PF01842 domain.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	BIOSYNTHETIC THREONINE DEAMINASE	threonine deaminase activity lyase activity ammonia-lyase activity catalytic activity carbon-nitrogen lyase activity vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding organic cyclic compound binding anion binding heterocyclic compound binding small molecule binding threonine deaminase activity lyase activity ammonia-lyase activity catalytic activity carbon-nitrogen lyase activity vitamin binding vitamin B6 binding pyridoxal phosphate binding ion binding binding organic cyclic compound binding anion binding heterocyclic compound binding small molecule binding L-serine ammonia-lyase activity amino acid binding	organonitrogen compound metabolic process oxoacid metabolic process cellular metabolic process aspartate family amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process L-amino acid metabolic process proteinogenic amino acid metabolic process organic substance metabolic process threonine metabolic process metabolic process organonitrogen compound metabolic process oxoacid metabolic process cellular metabolic process aspartate family amino acid metabolic process carboxylic acid metabolic process amino acid metabolic process primary metabolic process organic acid metabolic process alpha-amino acid metabolic process L-amino acid metabolic process proteinogenic amino acid metabolic process organic substance metabolic process threonine metabolic process metabolic process small molecule metabolic process cellular process catabolic process organic acid catabolic process cellular catabolic process carboxylic acid catabolic process threonine catabolic process amino acid catabolic process organonitrogen compound catabolic process aspartate family amino acid catabolic process L-amino acid catabolic process alpha-amino acid catabolic process proteinogenic amino acid catabolic process small molecule catabolic process organic substance catabolic process cellular biosynthetic process organonitrogen compound biosynthetic process organic acid biosynthetic process carboxylic acid biosynthetic process isoleucine biosynthetic process organic substance biosynthetic process branched-chain amino acid metabolic process small molecule biosynthetic process amino acid biosynthetic process biosynthetic process branched-chain amino acid biosynthetic process isoleucine metabolic process alpha-amino acid biosynthetic process serine family amino acid metabolic process L-serine catabolic process L-serine metabolic process serine family amino acid catabolic process	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036052	Tryptophan synthase beta chain-like, PALP domain superfamily	Homologous Superfamily
A	IPR001721	Threonine dehydratase, ACT-like domain	Domain
A	IPR038110	Threonine dehydratase, ACT-like domain superfamily	Homologous Superfamily
A	IPR005787	Threonine dehydratase, biosynthetic	Family
A	IPR045865	ACT-like domain	Homologous Superfamily
A	IPR000634	Serine/threonine dehydratase, pyridoxal-phosphate-binding site	Binding Site
A	IPR001926	Tryptophan synthase beta chain-like, PALP domain	Domain

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

Chains	Enzyme Name	Description	Catalytic Residues
A	threonine ammonia-lyase (biosynthetic) M-CSA #886	Catalyses the anaerobic formation of alpha-ketobutyrate and ammonia from threonine in a two-step reaction. The first step involved a dehydration of threonine and a production of enamine intermediates (aminocrotonate), which tautomerises to its imine form (iminobutyrate). Both intermediates are unstable and short-lived. The second step is the non-enzymatic hydrolysis of the enamine/imine intermediates to form 2-ketobutyrate and free ammonia.	Defined by 2 residues: LYS:A-62SER:A-315 \| Explore in 3D: M-CSA Motif Definition Search M-CSA Motif EC: 4.2.1.16 (PDB Primary Data) Search M-CSA Motif + EC 4.2.1.16

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 R01GM133198.