CDK2/cyclin A2 in complex with an imidazo[1,2-c]pyrimidin-5-one inhibitor. Determined by X-ray diffraction at 1.8 Å resolution. Released 24 Mar 2021.
Explore 7ACK in 3D Show helices and sheets RCSB PDB PDBe
7ACK contains 72 α-helices and 22 β-strands across 4 chains. Residue ranges use author residue numbering, as in the PDB file, from PDBe. To see them in 3D, choose the Cartoon representation with Secondary structure coloring: helices, sheets and coils get different colors.
| Element | Residues | Length | Sheet |
|---|---|---|---|
| β-strand | 4-11 | 8 | 1 |
| β-strand | 17-23 | 7 | 1 |
| β-strand | 29-36 | 8 | 1 |
| α-helix | 46-57 | 12 | |
| β-strand | 63 | 1 | 2 |
| α-helix | 64-65 | 2 | |
| β-strand | 66-72 | 7 | 1 |
| β-strand | 75-81 | 7 | 1 |
| β-strand | 85-86 | 2 | 2 |
| α-helix | 87-93 | 7 | |
| α-helix | 101-120 | 20 | |
| β-strand | 123-124 | 2 | 3 |
| α-helix | 130-132 | 3 | |
| β-strand | 133-135 | 3 | 2 |
| β-strand | 141-143 | 3 | 2 |
| β-strand | 150-151 | 2 | 3 |
| α-helix | 166-168 | 3 | |
| α-helix | 171-174 | 4 | |
| α-helix | 183-198 | 16 | |
| α-helix | 208-219 | 12 | |
| α-helix | 230-232 | 3 | |
| α-helix | 243-247 | 5 | |
| α-helix | 248-251 | 4 | |
| α-helix | 257-266 | 10 | |
| α-helix | 275-276 | 2 | |
| α-helix | 277-281 | 5 | |
| α-helix | 284-286 | 3 |
| Element | Residues | Length | Sheet |
|---|---|---|---|
| α-helix | 179-192 | 14 | |
| α-helix | 194-196 | 3 | |
| α-helix | 199-202 | 4 | |
| α-helix | 208-224 | 17 | |
| α-helix | 229-245 | 17 | |
| α-helix | 250-252 | 3 | |
| α-helix | 253-268 | 16 | |
| α-helix | 272-274 | 3 | |
| α-helix | 275-281 | 7 | |
| α-helix | 288-301 | 14 | |
| α-helix | 311-319 | 9 | |
| α-helix | 327-339 | 13 | |
| α-helix | 344-347 | 4 | |
| α-helix | 352-368 | 17 | |
| α-helix | 374-380 | 7 | |
| α-helix | 388-400 | 13 | |
| α-helix | 401-403 | 3 | |
| α-helix | 408-412 | 5 | |
| α-helix | 416-418 | 3 | |
| α-helix | 421-423 | 3 | |
| α-helix | 425-427 | 3 |
| Element | Residues | Length | Sheet |
|---|---|---|---|
| β-strand | 4-11 | 8 | 4 |
| β-strand | 17-23 | 7 | 4 |
| β-strand | 29-36 | 8 | 4 |
| α-helix | 46-57 | 12 | |
| β-strand | 63 | 1 | 5 |
| α-helix | 64-65 | 2 | |
| β-strand | 66-71 | 6 | 4 |
| β-strand | 75-81 | 7 | 4 |
| β-strand | 85-86 | 2 | 5 |
| α-helix | 87-93 | 7 | |
| α-helix | 101-120 | 20 | |
| β-strand | 123-124 | 2 | 6 |
| α-helix | 130-132 | 3 | |
| β-strand | 133-135 | 3 | 5 |
| β-strand | 141-143 | 3 | 5 |
| β-strand | 150-151 | 2 | 6 |
| α-helix | 166-168 | 3 | |
| α-helix | 171-174 | 4 | |
| α-helix | 183-198 | 16 | |
| α-helix | 208-219 | 12 | |
| α-helix | 230-232 | 3 | |
| α-helix | 243-247 | 5 | |
| α-helix | 248-251 | 4 | |
| α-helix | 257-266 | 10 | |
| α-helix | 275-276 | 2 | |
| α-helix | 277-281 | 5 | |
| α-helix | 284-286 | 3 |
| Element | Residues | Length | Sheet |
|---|---|---|---|
| α-helix | 179-192 | 14 | |
| α-helix | 199-202 | 4 | |
| α-helix | 208-224 | 17 | |
| α-helix | 229-245 | 17 | |
| α-helix | 250-268 | 19 | |
| α-helix | 272-274 | 3 | |
| α-helix | 275-281 | 7 | |
| α-helix | 288-301 | 14 | |
| α-helix | 311-319 | 9 | |
| α-helix | 327-340 | 14 | |
| α-helix | 344-347 | 4 | |
| α-helix | 352-368 | 17 | |
| α-helix | 374-380 | 7 | |
| α-helix | 384-400 | 17 | |
| α-helix | 401-403 | 3 | |
| α-helix | 408-412 | 5 | |
| α-helix | 416-418 | 3 | |
| α-helix | 421-423 | 3 | |
| α-helix | 425-427 | 3 |
| Molecule | Chains | Type | Length | Organism | UniProt |
|---|---|---|---|---|---|
| Cyclin-dependent kinase 2 | A, C | protein | 299 | Homo sapiens | P24941 (AlphaFold model) |
| Cyclin-A2 | B, D | protein | 258 | Homo sapiens | P20248 (AlphaFold model) |
>7ACK_1 Cyclin-dependent kinase 2 (chains A, C) SMENFQKVEKIGEGTYGVVYKARNKLTGEVVALKKIRLDTETEGVPSTAIREISLLKELN HPNIVKLLDVIHTENKLYLVFEFLHQDLKKFMDASALTGIPLPLIKSYLFQLLQGLAFCH SHRVLHRDLKPQNLLINTEGAIKLADFGLARAFGVPVRTYTHEVVTLWYRAPEILLGCKY YSTAVDIWSLGCIFAEMVTRRALFPGDSEIDQLFRIFRTLGTPDEVVWPGVTSMPDYKPS FPKWARQDFSKVVPPLDEDGRSLLSQMLHYDPNKRISAKAALAHPFFQDVTKPVPHLRL
>7ACK_2 Cyclin-A2 (chains B, D) VPDYHEDIHTYLREMEVKCKPKVGYMKKQPDITNSMRAILVDWLVEVGEEYKLQNETLHL AVNYIDRFLSSMSVLRGKLQLVGTAAMLLASKFEEIYPPEVAEFVYITDDTYTKKQVLRM EHLVLKVLTFDLAAPTVNQFLTQYFLHQQPANCKVESLAMFLGELSLIDADPYLKYLPSV IAGAAFHLALYTVTGQSWPESLIRKTGYTLESLKPCLMDLHQTYLKAPQHAQQSIREKYK NSKYHGVSLLNPPETLNL
| ID | Name | Formula | Copies |
|---|---|---|---|
| R7B | 8-cyclohexyl-6~{H}-imidazo[1,2-c]pyrimidin-5-one | C12 H15 N3 O | 2 |
Water and common crystallization additives (EDO, NA, NO3) are not listed.
Imidazo[1,2-c]pyrimidin-5(6H)-one inhibitors of CDK2: Synthesis, kinase inhibition and co-crystal structure. Jansa, J., Jorda, R., Skerlova, J. et al. Eur J Med Chem (2021) 216:113309-113309. DOI 10.1016/j.ejmech.2021.113309 · PubMed
Other PDB entries of the same protein (UniProt P24941 (AlphaFold model), which also has an AlphaFold model), best resolution first:
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