1KPS: Ubiquitin-like protein SUMO-1 conjugating enzyme

Structural Basis for E2-mediated SUMO conjugation revealed by a complex between ubiquitin conjugating enzyme Ubc9 and RanGAP1. Determined by X-ray diffraction at 2.5 Å resolution. Released 13 Feb 2002.

Method
X-ray diffraction
Resolution
2.5 Å
Organisms
Homo sapiens, Mus musculus
Chains
4
Atoms
5,537
Mol. weight
73.85 kDa
Released
13 Feb 2002

Explore 1KPS in 3D Show helices and sheets RCSB PDB PDBe

Secondary structure: helices and β-sheets

1KPS contains 34 α-helices and 18 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.

Chain A: 6 helices, 9 β-strands

ElementResiduesLengthSheet
α-helix5-1814
β-strand25-3061
β-strand36-46111
β-strand4712
α-helix481
β-strand5412
β-strand57-6371
β-strand74-7741
β-strand8613
β-strand9111
β-strand9213
α-helix95-973
α-helix109-12113
α-helix131-1399
α-helix141-15414
Chain B: 10 helices, 0 β-strands
ElementResiduesLengthSheet
α-helix436-4416
α-helix445-4506
α-helix455-4617
α-helix468-48013
α-helix486-50520
α-helix511-52111
α-helix538-54912
α-helix555-5573
α-helix558-5658
α-helix577-58812
Chain C: 7 helices, 9 β-strands
ElementResiduesLengthSheet
α-helix5-1814
β-strand25-3064
β-strand36-46114
β-strand4715
α-helix481
β-strand5415
β-strand57-6374
β-strand74-7744
α-helix80-812
β-strand8616
β-strand9114
β-strand9216
α-helix95-973
α-helix109-12113
α-helix131-1399
α-helix141-15414
Chain D: 11 helices, 0 β-strands
ElementResiduesLengthSheet
α-helix436-4416
α-helix445-4495
α-helix455-4628
α-helix468-48013
α-helix486-50520
α-helix511-52111
α-helix532-5343
α-helix538-54912
α-helix555-5573
α-helix558-5658
α-helix577-58812

Molecules and chains

MoleculeChainsTypeLengthOrganismUniProt
Ubiquitin-like protein SUMO-1 conjugating enzymeA, Cprotein159Homo sapiensP63279 (AlphaFold model)
Ran-GTPase activating protein 1B, Dprotein171Mus musculusP46061 (AlphaFold model)
Sequence of entity 1 (A, C), FASTA
>1KPS_1 Ubiquitin-like protein SUMO-1 conjugating enzyme (chains A, C)
SMSGIALSRLAQERKAWRKDHPFGFVAVPTKNPDGTMNLMNWECAIPGKKGTPWEGGLFK
LRMLFKDDYPSSPPKCKFEPPLFHPNVYPSGTVCLSILEEDKDWRPAITIKQILLGIQEL
LNEPNIQDPAQAEAYTIYCQNRVEYEKRVRAQAKKFAPS
Sequence of entity 2 (B, D), FASTA
>1KPS_2 Ran-GTPase activating protein 1 (chains B, D)
SNSGEPAPVLSSPTPTDLSTFLSFPSPEKLLRLGPKVSVLIVQQTDTSDPEKVVSAFLKV
ASVFRDDASVKTAVLDAIDALMKKAFSCSSFNSNTFLTRLLIHMGLLKSEDKIKAIPSLH
GPLMVLNHVVRQDYFPKALAPLLLAFVTKPNGALETCSFARHNLLQTLYNI

Primary citation

Structural basis for E2-mediated SUMO conjugation revealed by a complex between ubiquitin-conjugating enzyme Ubc9 and RanGAP1. Bernier-Villamor, V., Sampson, D.A., Matunis, M.J. et al. Cell (2002) 108:345-356. DOI 10.1016/S0092-8674(02)00630-X · PubMed

Other PDB entries of the same protein (UniProt P63279 (AlphaFold model), which also has an AlphaFold model), best resolution first:

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