G1/S-specific cyclin-D3 (CCND3) is a 292-residue protein from Homo sapiens. This is its AlphaFold structure prediction, created 1 Aug 2025. UniProt accession: P30281.
Explore in 3D Color by confidence AlphaFold DB UniProt
The mean pLDDT of this model is 86.9 (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 | 73% |
| 70 to 90 | Confident: backbone generally right | 11% |
| 50 to 70 | Low: treat with caution | 3% |
| Below 50 | Very low: often disordered regions | 12% |
What pLDDT means and how to read it
Regulatory component of the cyclin D3-CDK4 (DC) complex that phosphorylates and inhibits members of the retinoblastoma (RB) protein family including RB1 and regulates the cell-cycle during G(1)/S transition (PubMed:8114739). Phosphorylation of RB1 allows dissociation of the transcription factor E2F from the RB/E2F complex and the subsequent transcription of E2F target genes which are responsible for the progression through the G(1) phase (PubMed:8114739). Hypophosphorylates RB1 in early G(1) phase (PubMed:8114739). Cyclin D-CDK4 complexes are major integrators of various mitogenenic and antimitogenic signals (PubMed:8114739). Component of the ternary complex, cyclin D3/CDK4/CDKN1B,…
Interacts with the CDK4 and CDK6 protein kinases to form a serine/threonine kinase holoenzyme complex (PubMed:19237555, PubMed:8114739, PubMed:9106657). Interacts with isoform p58 of CDK11 (CDK11A or CDK11B) to form a serine/threonine kinase holoenzyme complex (PubMed:12082095). The cyclin subunit imparts substrate specificity to the complex (PubMed:8114739). Interacts with ATF5…
Nucleus, Cytoplasm
Compare the prediction with experimentally determined structures of the same protein:
MolViewer loads the AlphaFold model straight from AlphaFold DB into your browser. Show it as a cartoon, color by pLDDT, measure distances and angles, and load a PDB structure next to it to compare.