7JZV

Cryo-EM structure of the BRCA1-UbcH5c/BARD1 E3-E2 module bound to a nucleosome


Protein Family Annotation Pfam Database Homepage

ChainsAccessionIdentifierDescriptionCommentsSource
APF00097Zinc finger, C3HC4 type (RING finger) (zf-C3HC4)Zinc finger, C3HC4 type (RING finger)The C3HC4 type zinc-finger (RING finger) is a cysteine-rich domain of 40 to 60 residues that coordinates two zinc ions, and has the consensus sequence: C-X2-C-X(9-39)-C-X(1-3)-H-X(2-3)-C-X2-C-X(4-48)-C-X2-C where X is any amino acid [1]. Many protein ...The C3HC4 type zinc-finger (RING finger) is a cysteine-rich domain of 40 to 60 residues that coordinates two zinc ions, and has the consensus sequence: C-X2-C-X(9-39)-C-X(1-3)-H-X(2-3)-C-X2-C-X(4-48)-C-X2-C where X is any amino acid [1]. Many proteins containing a RING finger play a key role in the ubiquitination pathway [2].
Domain
APF00179Ubiquitin-conjugating enzyme (UQ_con)Ubiquitin-conjugating enzymeProteins 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 ...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 cysteine [4, 5].
Domain
BPF14835zf-RING of BARD1-type protein (zf-RING_6)zf-RING of BARD1-type proteinThe RING domain of the breast and ovarian cancer tumour-suppressor BRCA1 interacts with multiple cognate proteins, including the RING protein BARD1. Proper function of the BRCA1 RING domain is critical, as evidenced by the many cancer-predisposing mu ...The RING domain of the breast and ovarian cancer tumour-suppressor BRCA1 interacts with multiple cognate proteins, including the RING protein BARD1. Proper function of the BRCA1 RING domain is critical, as evidenced by the many cancer-predisposing mutations found within this domain. A dimer is formed between the RING domains of BRCA1 and BARD1. The BRCA1-BARD1 structure provides a model for its ubiquitin ligase activity, illustrates how the BRCA1 RING domain can be involved in associations with multiple protein partners and provides a framework for understanding cancer-causing mutations at the molecular level [1]. The corresponding BRCA1-RING domain is on family zf-C3HC4_2, Pfam:PF13923.
Domain
BPF12796Ankyrin repeats (3 copies) (Ank_2)Ankyrin repeats (3 copies)- Repeat
C, IPF16211C-terminus of histone H2A (Histone_H2A_C)C-terminus of histone H2A- Family
C, IPF00125Core histone H2A/H2B/H3/H4 (Histone)Core histone H2A/H2B/H3/H4- Domain
D, JPF00125Core histone H2A/H2B/H3/H4 (Histone)Core histone H2A/H2B/H3/H4- Domain
E, KPF00125Core histone H2A/H2B/H3/H4 (Histone)Core histone H2A/H2B/H3/H4- Domain
F, LPF15511Centromere kinetochore component CENP-T histone fold (CENP-T_C)Centromere kinetochore component CENP-T histone foldCENP-T is a family of vertebral kinetochore proteins that associates directly with CENP-W. The N-terminus of CENP-T proteins interacts directly with the Ndc80 complex in the outer kinetochore. Importantly, the CENP-T-W complex does not directly asso ...CENP-T is a family of vertebral kinetochore proteins that associates directly with CENP-W. The N-terminus of CENP-T proteins interacts directly with the Ndc80 complex in the outer kinetochore. Importantly, the CENP-T-W complex does not directly associate with CENP-A, but with histone H3 in the centromere region. CENP-T and -W form a hetero-tetramer with CENP-S and -X and bind to a ~100 bp region of nucleosome-free DNA forming a nucleosome-like structure. The DNA-CENP-T-W-S-X complex is likely to be associated with histone H3-containing nucleosomes rather than with CENP-nucleosomes. This domain is the C-terminal histone fold domain of CENP-T, which associates with chromatin [2-3].
Domain

Gene Product Annotation Gene Product Annotation

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
ABRCA1,Ubiquitin-conjugating enzyme E2 D3
BBRCA1-associated RING domain protein 1
N, nHistone H2A type 2-A
O, oHistone H2B type 1-K
P, pHistone H3.2
Q, qHistone H4
XWidom 601 153-bpnone none none
YWidom 601 153-bpnone none none