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5K1I

PDE4 crystal structure in complex with small molecule inhibitor

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B, C, D, E...
(A, B, C, D, E...)
cAMP-specific 3',5'-cyclic phosphodiesterase 4Dpolymer32637578.68UniProt (Q08499)
Pfam (PF00233)
Homo sapiens (Human)DPDE3,PDE43
2AA, DA, I, L, O...
(G, H, A, B, C...)
4-[(5-acetyl-2-ethyl-3-oxo-6-phenyl-2,3-dihydropyridazin-4-yl)amino]benzoic acidnon-polymer377.48Chemie (6PT)
3BA, EA, J, M, P...
(G, H, A, B, C...)
ZINC IONnon-polymer65.48Chemie (ZN)
4CA, FA, K, N, Q...
(G, H, A, B, C...)
MAGNESIUM IONnon-polymer24.38Chemie (MG)
5GA, HA, IA, JA, KA...
(A, B, C, D, E...)
waterwater18.0210Chemie (HOH)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains8
Total formula weight300628.8
Non-Polymers*Number of molecules24
Total formula weight3736.9
All*Total formula weight304365.6
*Water molecules are not included.

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PDB entries from 2025-07-23

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