1C4Z
STRUCTURE OF AN E6AP-UBCH7 COMPLEX: INSIGHTS INTO THE UBIQUITINATION PATHWAY
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
- Pharos: Disease Associations
- 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 | d1c4za_ | Alpha and beta proteins (a+b) | Hect, E3 ligase catalytic domain | Hect, E3 ligase catalytic domain | Hect, E3 ligase catalytic domain | Ubiquitin-protein ligase E3a (E6ap) | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
B | d1c4zb_ | Alpha and beta proteins (a+b) | Hect, E3 ligase catalytic domain | Hect, E3 ligase catalytic domain | Hect, E3 ligase catalytic domain | Ubiquitin-protein ligase E3a (E6ap) | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
C | d1c4zc_ | Alpha and beta proteins (a+b) | Hect, E3 ligase catalytic domain | Hect, E3 ligase catalytic domain | Hect, E3 ligase catalytic domain | Ubiquitin-protein ligase E3a (E6ap) | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
D | d1c4zd_ | Alpha and beta proteins (a+b) | UBC-like | UBC-like | UBC-related | Ubiquitin conjugating enzyme, UBC | human (Homo sapiens ) [TaxId: 9606 ], | SCOPe (2.08) |
Domain Annotation: SCOP2 Classification SCOP2 Database Homepage
Chains | Type | Family Name | Domain Identifier | Family Identifier | Provenance Source (Version) |
---|---|---|---|---|---|
A | SCOP2 Family | Hect, E3 ligase catalytic domain | 8024339 | 4002196 | SCOP2 (2022-06-29) |
A | SCOP2 Superfamily | Hect, E3 ligase catalytic domain | 8036718 | 3000934 | SCOP2 (2022-06-29) |
B | SCOP2B Superfamily | Hect, E3 ligase catalytic domain | 8036718 | 3000934 | SCOP2B (2022-06-29) |
C | SCOP2B Superfamily | Hect, E3 ligase catalytic domain | 8036718 | 3000934 | SCOP2B (2022-06-29) |
D | SCOP2 Family | UBC-related | 8022443 | 4001046 | SCOP2 (2022-06-29) |
D | SCOP2 Superfamily | UBC-like | 8034823 | 3000570 | 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 | HECT | e1c4zA1 | A: a+b complex topology | X: Hect, E3 ligase catalytic domain (From Topology) | H: Hect, E3 ligase catalytic domain (From Topology) | T: Hect, E3 ligase catalytic domain | F: HECT | ECOD (1.6) |
B | HECT | e1c4zB1 | A: a+b complex topology | X: Hect, E3 ligase catalytic domain (From Topology) | H: Hect, E3 ligase catalytic domain (From Topology) | T: Hect, E3 ligase catalytic domain | F: HECT | ECOD (1.6) |
C | HECT | e1c4zC1 | A: a+b complex topology | X: Hect, E3 ligase catalytic domain (From Topology) | H: Hect, E3 ligase catalytic domain (From Topology) | T: Hect, E3 ligase catalytic domain | F: HECT | ECOD (1.6) |
D | UQ_con | e1c4zD1 | A: a+b two layers | X: UBC-like | H: UBC-like (From Topology) | T: UBC-like | F: UQ_con | ECOD (1.6) |
Domain Annotation: CATH CATH Database Homepage
Protein Family Annotation Pfam Database Homepage
Chains | Accession | Name | Description | Comments | Source |
---|---|---|---|---|---|
PF00632 | HECT-domain (ubiquitin-transferase) (HECT) | HECT-domain (ubiquitin-transferase) | The name HECT comes from Homologous to the E6-AP Carboxyl Terminus. | Domain | |
PF00179 | Ubiquitin-conjugating enzyme (UQ_con) | Ubiquitin-conjugating enzyme | Proteins destined for proteasome-mediated degradation may be ubiquitinated. Ubiquitination follows conjugation of ubiquitin to a conserved cysteine residue of UBC homologues. TSG101 is one of several UBC homologues that lacks this active site cystein ... | Domain |
Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage
InterPro: Protein Family Classification InterPro Database Homepage
Chains | Accession | Name | Type |
---|---|---|---|
IPR032353 | Ubiquitin-protein ligase E3A, N-terminal zinc-binding domain | Domain | |
IPR035983 | HECT, E3 ligase catalytic domain | Homologous Superfamily | |
IPR044611 | Ubiquitin-protein ligase E3A/B/C-like | Family | |
IPR000569 | HECT domain | Domain | |
IPR042556 | Ubiquitin-protein ligase E3A, N-terminal zinc-binding domain superfamily | Homologous Superfamily | |
IPR017134 | Ubiquitin-protein ligase E3A | Family | |
IPR050113 | Ubiquitin-conjugating enzyme | Family | |
IPR016135 | Ubiquitin-conjugating enzyme/RWD-like | Homologous Superfamily | |
IPR023313 | Ubiquitin-conjugating enzyme, active site | Active Site | |
IPR000608 | Ubiquitin-conjugating enzyme E2, catalytic core domain | Domain |
Pharos: Disease Associations Pharos Homepage Annotation
Structure Motif Annotation: Mechanism and Catalytic Site Atlas M-CSA Database Homepage
Chains | Enzyme Name | Description | Catalytic Residues |
---|---|---|---|
HECT-type E3 ubiquitin transferase M-CSA #438 | Ubiquitination is mediated by three enzymes, E1 (PDB:3cmm), E2 (PDB:1ayz) and E3 (PDB:1c4z). The first, E1, is essential for ubiquitin activation and transferring the substrate onto the second cascade enzyme, E2, which responsible for mediating repeated ubiquitination at the eventual substrate, which is brought into proximity of E2 by the active site of E3, the enzyme which also regulates substrate specificity. This entry represents the first of the three reactions occurring in this cascade: ubiquitin:[E1 ubiquitin-activating enzyme] ligase (AMP-forming) E6AP belongs to the HECT (homologous to E6AP COOH-terminus) class of E3s, which has at least 20 members in humans. The HECT E3s are so far unique among the known classes of E3s in that they form a ubiquitin-thioester intermediate and directly catalyse substrate ubiquitination. HECT E3s share a conserved ~40-kD COOH-terminal catalytic domain, the HECT domain (IPR000569), that has at least four biochemical activities: (i) it binds specific E2s; (ii) it accepts ubiquitin from the E2, forming a ubiquitin-thioester intermediate with its active-site cysteine; (iii) it transfers ubiquitin to the eta-amino groups of lysine side chains on the substrate by catalysing the formation of an isopeptide bond; and (iv) it transfers additional ubiquitin molecules to the growing end of the multi-ubiquitin chain. The NH2-terminal sequences of HECT E3s are not conserved and contain the primary determinants for specific substrate recognition. HECT E3s have been implicated in cancer, hypertension, neurological disorders, and other diseases. Moreover, some pathogenic bacteria have evolved HECT-like E3s as virulence factors to manipulate host cell signalling. | Defined by 7 residues: ARG:A-12 [auth A-506]GLU:A-45 [auth A-539]GLU:A-56 [auth A-550]ASP:A-113 [auth A-607]HIS:A-324 [auth A-818]CYS:A-326 [auth A-820]CYS:D-86 | EC: 6.3.2 (PDB Primary Data) EC: 2.3.2.26 (UniProt) EC: 6.3.2.19 (PDB Primary Data) EC: 2.3.2.23 (UniProt) |