Dynein regulatory complex protein 9 (IQCG) is a 443-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: Q9H095.
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The mean pLDDT of this model is 71.5 (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 | 42% |
| 70 to 90 | Confident: backbone generally right | 19% |
| 50 to 70 | Low: treat with caution | 4% |
| Below 50 | Very low: often disordered regions | 35% |
What pLDDT means and how to read it
Component of the nexin-dynein regulatory complex (N-DRC), a key regulator of ciliary/flagellar motility which maintains the alignment and integrity of the distal axoneme and regulates microtubule sliding in motile axonemes. Binds calmodulin when cellular Ca(2+) levels are low and thereby contributes to the regulation of calcium and calmodulin-dependent protein kinase IV (CAMK4) activity; contributes to the regulation of CAMK4 signaling cascades. Required for normal axoneme assembly in sperm flagella, normal sperm tail formation and for male fertility
Component of the nexin-dynein regulatory complex (N-DRC) (By similarity). Interacts (via IQ domain) with CALM when calcium levels are low. Does not interact with CALM in the presence of Ca(2+). Interacts with the HSP70 proteins HSPA1L and HSPA8 (PubMed:24787902). May form a complex with CAMK4 and HSP70 (By similarity)
Cytoplasm, Cell projection, cilium, flagellum, Cell projection, cilium, Cytoplasm, cytoskeleton, Cytoplasm, cytoskeleton, flagellum axoneme
Compare the prediction with experimentally determined structures of the same protein:
| PDB ID | Method | Resolution | Chains and residues |
|---|---|---|---|
| 4LZX | X-ray | 1.5 Å | B=389-423 |
| 4M1L | X-ray | 2.1 Å | B=376-435 |
| 8J07 | EM | 4.1 Å | 9=1-443 |
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