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9COC

Two protofilament structure of alpha1B and betaI/IVb microtubule bound to GDP

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, B, C, D
(B, E, F, K)
Tubulin beta chainpolymer44449717.64UniProt (P07437)
Pfam (PF00091)
Pfam (PF03953)
Homo sapiens (human)Tubulin beta-5 chain
2E, F, G, H
(A, D, C, I)
Tubulin alpha-1B chainpolymer45150204.44UniProt (P68363)
Pfam (PF00091)
Pfam (PF03953)
Homo sapiens (human)Alpha-tubulin ubiquitous,Tubulin K-alpha-1,Tubulin alpha-ubiquitous chain
3I, J, K, L
(B, E, F, K)
GUANOSINE-5'-DIPHOSPHATEnon-polymer443.24Chemie (GDP)
4M, O, Q, S
(A, D, C, I)
GUANOSINE-5'-TRIPHOSPHATEnon-polymer523.24Chemie (GTP)
5N, P, R, T
(A, D, C, I)
MAGNESIUM IONnon-polymer24.34Chemie (MG)
PubChem (888)
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains8
Total formula weight399688.3
Non-Polymers*Number of molecules12
Total formula weight3962.7
All*Total formula weight403651.0
*Water molecules are not included.

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PDB entries from 2026-06-10

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