CATH Classification
Level | CATH Code | Description |
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3 | Alpha Beta |
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3.40 | 3-Layer(aba) Sandwich |
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3.40.50 | Rossmann fold |
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3.40.50.10190 | BRCT domain |
Domain Context
CATH Clusters
Superfamily | BRCT domain |
Functional Family | Breast cancer type 1 susceptibility protein homolog |
Enzyme Information
2.3.2.27 |
RING-type E3 ubiquitin transferase.
based on mapping to UniProt P38398
S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [acceptor protein]-L-lysine = [E2 ubiquitin-conjugating enzyme]-L-cysteine + N(6)- ubiquitinyl-[acceptor protein]-L-lysine.
-!- RING E3 ubiquitin transferases serve as mediators bringing the ubiquitin-charged E2 ubiquitin-conjugating enzyme (EC 2.3.2.23) and an acceptor protein together to enable the direct transfer of ubiquitin through the formation of an isopeptide bond between the C-terminal glycine residue of ubiquitin and the epsilon-amino group of an L-lysine residue of the acceptor protein. -!- Unlike EC 2.3.2.26 the RING-E3 domain does not form a catalytic thioester intermediate with ubiquitin. -!- Many members of the RING-type E3 ubiquitin transferase family are not able to bind a substrate directly, and form a complex with a cullin scaffold protein and a substrate recognition module (the complexes are named CRL for Cullin-RING-Ligase). -!- In these complexes, the RING-type E3 ubiquitin transferase provides an additional function, mediating the transfer of a NEDD8 protein from a dedicated E2 carrier to the cullin protein (see EC 2.3.2.32). -!- Cf. EC 2.3.2.31.
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UniProtKB Entries (1)
P38398 |
BRCA1_HUMAN
Homo sapiens
Breast cancer type 1 susceptibility protein
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PDB Structure
PDB | 3K16 |
External Links | |
Method | X-RAY DIFFRACTION |
Organism | |
Primary Citation |
Comparison of the Structures and Peptide Binding Specificities of the BRCT Domains of MDC1 and BRCA1
Structure
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