Histone chaperone ASF1B (ASF1B) is a 202-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9NVP2.
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The mean pLDDT of this model is 84.6 (confident overall). pLDDT is AlphaFold's per-residue confidence score from 0 to 100. In MolViewer, choose the B-factor color scheme to color the model by pLDDT, because AlphaFold stores it in the B-factor column.
| pLDDT band | Meaning | Share of residues |
|---|---|---|
| Above 90 | Very high: backbone and side chains are usually accurate | 75% |
| 70 to 90 | Confident: backbone generally right | 1% |
| 50 to 70 | Low: treat with caution | 6% |
| Below 50 | Very low: often disordered regions | 17% |
What pLDDT means and how to read it
Histone chaperone that facilitates histone deposition and histone exchange and removal during nucleosome assembly and disassembly (PubMed:11897662, PubMed:14718166, PubMed:15664198, PubMed:16151251, PubMed:21454524, PubMed:26527279). Cooperates with chromatin assembly factor 1 (CAF-1) to promote replication-dependent chromatin assembly (PubMed:11897662, PubMed:14718166, PubMed:15664198, PubMed:16151251). Also involved in the nuclear import of the histone H3-H4 dimer together with importin-4 (IPO4): specifically recognizes and binds newly synthesized histones with the monomethylation of H3 'Lys-9' (H3K9me1) and diacetylation at 'Lys-5' and 'Lys-12' of H4 (H4K5K12ac) marks in the cytosol…
Interacts with histone H3 (via C-terminus), including histone H3.1, H3.2 and H3.3, and histone H4; the interaction with H3 is direct (PubMed:12842904, PubMed:14718166, PubMed:15664198, PubMed:16537536, PubMed:22195965). Interacts with the CHAF1A, CHAF1B and RBBP4 subunits of the CAF-1 complex (PubMed:11897662, PubMed:14718166, PubMed:16537536, PubMed:16980972). Interacts with HAT1, NASP and TAF1…
Nucleus, Cytoplasm, cytosol
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5BNX | X-ray | 2.31 Å | D=1-158 |
| 7V1M | X-ray | 2.83 Å | D/F=1-158 |
| 5BO0 | X-ray | 2.91 Å | D=1-158 |
| 7VCQ | X-ray | 3.0 Å | D/F/I=1-156 |
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