Protein unc-13 homolog A (Unc13a) is a 1735-residue protein from Rattus norvegicus. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q62768.
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The mean pLDDT of this model is 72.1 (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 | 31% |
| 70 to 90 | Confident: backbone generally right | 35% |
| 50 to 70 | Low: treat with caution | 9% |
| Below 50 | Very low: often disordered regions | 24% |
What pLDDT means and how to read it
Plays a role in vesicle maturation during exocytosis as a target of the diacylglycerol second messenger pathway. Involved in neurotransmitter release by acting in synaptic vesicle priming prior to vesicle fusion and participates in the activity-dependent refilling of readily releasable vesicle pool (RRP). Essential for synaptic vesicle maturation in most excitatory/glutamatergic but not inhibitory/GABA-mediated synapses. Facilitates neuronal dense core vesicles fusion as well as controls the location and efficiency of their synaptic release (By similarity). Also involved in secretory granule priming in insulin secretion. Plays a role in dendrite formation by melanocytes (By similarity)
Interacts with the N-termini of STX1A and/or STX1B1 and DOC2A (PubMed:8999968, PubMed:9195900, PubMed:9736751). Interacts with BSN (PubMed:12163476, PubMed:14734538). Interacts with RIMS1 which recruits UNC13A to the active zone (PubMed:11343654, PubMed:16704978). Forms homodimers via its first C2 domain. Also interacts via this domain with the zinc finger domain of RIMS2 (PubMed:16052212,…
Cytoplasm, Cell membrane, Presynaptic cell membrane, Presynaptic active zone
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 6NYT | X-ray | 1.37 Å | A=675-820 |
| 2CJT | X-ray | 1.44 Å | A/B/C/D=1-128 |
| 2CJS | X-ray | 1.78 Å | A/B=1-150 |
| 6NYC | X-ray | 1.89 Å | A=675-820 |
| 3SWH | X-ray | 2.65 Å | A/B=1148-1407, A/B=1453-1531 |
| 6A30 | X-ray | 2.79 Å | A=944-1407, A=1453-1523 |
| 4Y21 | X-ray | 2.9 Å | A=942-1407, A=1453-1523 |
| 5UF7 | X-ray | 2.9 Å | A=942-1407, A=1453-1531 |
| 5UE8 | X-ray | 3.35 Å | A/B=529-1407, A/B=1452-1531 |
| 7T7X | EM | 10.0 Å | A=529-755, A=1401-1407, A=1452-1665 |
| 7T81 | EM | 10.0 Å | A/C/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y=529-755, A/C/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y=1401-1407, A/C/D/E/F/G/H/I/J/K/L/M/N/O/P/Q/R/S/T/U/V/W/X/Y=1452-1665 |
| 1Y8F | NMR | A=567-616 | |
| 2KDU | NMR | B=458-492 |
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