Annotations: 7ZH9

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	SCCH domain-like	8003543	3000139	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Activating enzymes of the ubiquitin-like proteins	8017546	3000112	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	FCCH domain-like	8003532	3000138	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	E2 binding domain-like	8003942	3000147	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Activating enzymes of the ubiquitin-like proteins	8003540	3000112	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Activating enzymes of the ubiquitin-like proteins	8003540	3000112	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Activating enzymes of the ubiquitin-like proteins	8017546	3000112	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	CC (catalytic cysteine) domain-like	8003552	3000140	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	E1_FCCH	e7zh9A5	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: Alanine racemase-C	F: E1_FCCH	ECOD (1.6)
A	UBA_e1_thiolCys	e7zh9A6	A: alpha arrays	X: Catalytic cysteine domain in ubiquitin-activating enzyme (From Topology)	H: Catalytic cysteine domain in ubiquitin-activating enzyme (From Topology)	T: Catalytic cysteine domain in ubiquitin-activating enzyme	F: UBA_e1_thiolCys	ECOD (1.6)
A	ThiF_3	e7zh9A4	A: alpha arrays	X: Catalytic cysteine domain in ubiquitin-activating enzyme (From Topology)	H: Catalytic cysteine domain in ubiquitin-activating enzyme (From Topology)	T: Catalytic cysteine domain in ubiquitin-activating enzyme	F: ThiF_3	ECOD (1.6)
A	E1_UFD	e7zh9A1	A: a+b two layers	X: beta-Grasp	H: E2-binding domain of E1 (From Topology)	T: E2-binding domain of E1	F: E1_UFD	ECOD (1.6)
A	ThiF_1	e7zh9A2	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: Activating enzymes of the ubiquitin-like proteins	F: ThiF_1	ECOD (1.6)
A	ThiF_3	e7zh9A3	A: a/b three-layered sandwiches	X: Rossmann-like	H: Rossmann-related	T: Activating enzymes of the ubiquitin-like proteins	F: ThiF_3	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00899	ThiF family (ThiF)	ThiF family	This domain is found in ubiquitin activating E1 family and members of the bacterial ThiF/MoeB/HesA family. It is repeated in Ubiquitin-activating enzyme E1 [1-3].	Domain
A	PF09358	Ubiquitin fold domain (E1_UFD)	Ubiquitin fold domain	The ubiquitin fold domain is found at the C-terminus of ubiquitin-activating E1 family enzymes. This domain binds to E2 enzymes [1].	Domain
A	PF10585	Ubiquitin-activating enzyme, SCCH domain (UBA_E1_SCCH)	Ubiquitin-activating enzyme, SCCH domain	Ubiquitin-activating enzyme (E1 enzyme) activates ubiquitin by first adenylating with ATP its C-terminal glycine residue and thereafter linking this residue to the side chain of a cysteine residue in E1, yielding an ubiquitin-E1 thiolester and free A ...	Ubiquitin-activating enzyme (E1 enzyme) activates ubiquitin by first adenylating with ATP its C-terminal glycine residue and thereafter linking this residue to the side chain of a cysteine residue in E1, yielding an ubiquitin-E1 thiolester and free AMP. Later the ubiquitin moiety is transferred to a cysteine residue on one of the many forms of ubiquitin-conjugating enzymes (E2) [1]. This domain carries the last of five conserved cysteines that is part of the active site of the enzyme, responsible for ubiquitin thiolester complex formation, the active site being represented by the sequence motif PICTLKNFP [2,3,4]. The catalytic cysteine domain contains the E1 active site cysteine, and is divided in two half-domains, FCCH and SCCH, for 'first' and 'second' catalytic cysteine half-domain, respectively. This is the SCCH domain in which resides the catalytic cysteine [5].	Domain
A	PF16190	Ubiquitin-activating enzyme E1 FCCH domain (E1_FCCH)	Ubiquitin-activating enzyme E1 FCCH domain	This domain is found in the ubiquitin-activating E1 family enzymes [1].	Domain
A	PF16191	Ubiquitin-activating enzyme E1 four-helix bundle (E1_4HB)	Ubiquitin-activating enzyme E1 four-helix bundle	This domain is found in the ubiquitin-activating E1 family enzymes [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Ubiquitin-activating enzyme E1 1	binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding binding adenyl ribonucleotide binding nucleotide binding purine ribonucleotide binding purine ribonucleoside triphosphate binding nucleoside phosphate binding ion binding purine nucleotide binding organic cyclic compound binding anion binding adenyl nucleotide binding ATP binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding ubiquitin-like modifier activating enzyme activity ligase activity, forming carbon-sulfur bonds catalytic activity, acting on a protein ubiquitin activating enzyme activity catalytic activity ligase activity ATP-dependent activity	cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process catabolic process proteolysis involved in protein catabolic process primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis cellular response to stimulus cellular response to stress response to stimulus DNA damage response response to stress cellular process catabolic process proteolysis involved in protein catabolic process primary metabolic process protein catabolic process macromolecule catabolic process modification-dependent macromolecule catabolic process modification-dependent protein catabolic process proteolysis ubiquitin-dependent protein catabolic process metabolic process protein metabolic process macromolecule metabolic process protein ubiquitination macromolecule modification post-translational protein modification protein modification process protein modification by small protein conjugation protein modification by small protein conjugation or removal	intracellular anatomical structure cytoplasm cellular anatomical entity membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR042302	Ubiquitin-activating enzyme E1, FCCH domain superfamily	Homologous Superfamily
A	IPR000011	Ubiquitin/SUMO-activating enzyme E1-like	Family
A	IPR045886	ThiF/MoeB/HesA family	Family
A	IPR042449	Ubiquitin-activating enzyme E1, inactive adenylation domain, subdomain 1	Homologous Superfamily
A	IPR019572	Ubiquitin-activating enzyme, SCCH domain	Domain
A	IPR042063	Ubiquitin-activating enzyme E1, SCCH domain	Homologous Superfamily
A	IPR000594	THIF-type NAD/FAD binding fold	Domain
A	IPR032420	Ubiquitin-activating enzyme E1, four-helix bundle	Domain
A	IPR018075	Ubiquitin-activating enzyme E1	Family
A	IPR032418	Ubiquitin-activating enzyme E1, FCCH domain	Domain
A	IPR018965	Ubiquitin-activating enzyme E1, C-terminal	Domain
A	IPR035985	Ubiquitin-activating enzyme	Homologous Superfamily
A	IPR033127	Ubiquitin-activating enzyme E1, Cys active site	Active Site
A	IPR038252	Ubiquitin-activating enzyme E1, C-terminal domain superfamily	Homologous Superfamily
A	IPR018074	Ubiquitin-activating enzyme E1, conserved site	Conserved Site

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.