Origin of replication complex subunit 1B (ORC1B) is a 813-residue protein from Arabidopsis thaliana. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9SU24.
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The mean pLDDT of this model is 71.1 (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 | 23% |
| 70 to 90 | Confident: backbone generally right | 45% |
| 50 to 70 | Low: treat with caution | 6% |
| Below 50 | Very low: often disordered regions | 26% |
What pLDDT means and how to read it
Essential protein required for ovules fertilization (PubMed:15634699, PubMed:19171893). Component of the origin recognition complex (ORC) that binds origins of replication. It has a role in both chromosomal replication and mating type transcriptional silencing. Binds to the ARS consensus sequence (ACS) of origins of replication (By similarity). H3K4me3 effector that positively regulates the transcription of a subset of genes (PubMed:19171893)
Component of the origin recognition complex (ORC) composed of at least ORC1 (ORC1A or ORC1B), ORC2, ORC3, ORC4, ORC5 and ORC6. ORC is regulated in a cell-cycle and development dependent manner. It is sequentially assembled at the exit from anaphase of mitosis and disassembled as cells enter S phase. Interacts directly with ORC2 and ORC5 (PubMed:15358564, PubMed:16179646). Binds mostly unmodified…
Nucleus
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 5HH7 | X-ray | 1.9 Å | A=118-349 |
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