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4EPR

Discovery of Small Molecules that Bind to K-Ras and Inhibit Sos-Mediated Activation.

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A
(A)
GTPase KRaspolymer17019370.81UniProt (P01116)
Pfam (PF00071)
Homo sapiens (human)K-Ras 2, Ki-Ras, c-K-ras, c-Ki-ras, GTPase KRas, N-terminally processed
2B
(A)
GUANOSINE-5'-DIPHOSPHATEnon-polymer443.21Chemie (GDP)
PubChem (136073927)
PubChem (135398619)
PubChem (135402030)
PubChem (135431654)
PubChem (135566337)
PubChem (135760556)
PubChem (136026707)
PubChem (136053418)
PubChem (136663964)
PubChem (136664748)
PubChem (136759848)
PubChem (136759849)
PubChem (136759850)
PubChem (136836636)
PubChem (136847074)
PubChem (172898537)
3C
(A)
MAGNESIUM IONnon-polymer24.31Chemie (MG)
PubChem (888)
4D
(A)
waterwater18.0132Chemie (HOH)
Sequence modifications
A: 1 - 169 (UniProt: P01116)
PDBExternal DatabaseDetails
Gly 0-expression tag
Asp 12Gly 12engineered mutation
Ser 118Cys 118engineered mutation
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains1
Total formula weight19370.8
Non-Polymers*Number of molecules2
Total formula weight467.5
All*Total formula weight19838.3
*Water molecules are not included.

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PDB entries from 2026-03-25

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