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3R1H

Crystal structure of the Class I ligase ribozyme-substrate preligation complex, C47U mutant, Ca2+ bound

Entity
Entity IDChain IDDescriptionTypeChain lengthFormula weightNumber of moleculesDB Name (Accession)Biological sourceDescriptive keywords
1A, D
(A, D)
U1 small nuclear ribonucleoprotein Apolymer9811340.32UniProt (P09012)
Pfam (PF00076)
Homo sapiens (human)U1A, U1 snRNP A, U1-A
2B, E
(B, E)
5'-R(*UP*CP*CP*AP*GP*UP*A)-3'polymer72181.42
3C, F
(C, F)
Class I ligase ribozymepolymer13042102.92
4AA, BA, CA, DA, EA...
(F, C, E)
CALCIUM IONnon-polymer40.126Chemie (CA)
5GA, HA
(C, F)
waterwater18.039Chemie (HOH)
Sequence modifications
A, D: 1 - 98 (UniProt: P09012)
PDBExternal DatabaseDetails
His 31Tyr 31engineered mutation
Arg 36Gln 36engineered mutation
Sequence viewer
Contents of the asymmetric unit
PolymersNumber of chains6
Total formula weight111249.2
Non-Polymers*Number of molecules26
Total formula weight1042.0
All*Total formula weight112291.2
*Water molecules are not included.

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PDB entries from 2025-10-15

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