Nat Struct Biol. 2001 Aug;8(8):669-73.

Crystal structure of the human ubiquitin conjugating enzyme complex, hMms2-hUbc13.

Moraes TF, Edwards RA, McKenna S, Pastushok L, Xiao W, Glover JN, Ellison MJ.

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Department of Biochemistry, University of Alberta, Edmonton, Alberta, T6G-2H7, Canada.

Abstract

The ubiquitin conjugating enzyme complex Mms2-Ubc13 plays a key role in post-replicative DNA repair in yeast and the NF-kappaB signal transduction pathway in humans. This complex assembles novel polyubiquitin chains onto yet uncharacterized protein targets. Here we report the crystal structure of a complex between hMms2 (Uev1) and hUbc13 at 1.85 A resolution and a structure of free hMms2 at 1.9 A resolution. These structures reveal that the hMms2 monomer undergoes a localized conformational change upon interaction with hUbc13. The nature of the interface provides a physical basis for the preference of Mms2 for Ubc13 as a partner over a variety of other structurally similar ubiquitin-conjugating enzymes. The structure of the hMms2-hUbc13 complex provides the conceptual foundation for understanding the mechanism of Lys 63 multiubiquitin chain assembly and for its interactions with the RING finger proteins Rad5 and Traf6.

Comment in

Defining polyubiquitin chain topology. [Nat Struct Biol. 2001]
Defining polyubiquitin chain topology.Chan NL, Hill CP. Nat Struct Biol. 2001 Aug; 8(8):650-2.

PMID:: 11473255; [PubMed - indexed for MEDLINE]

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Structures reported by this article

Crystal Structure Of Hmms2-Hubc13

PDB: 1J7D

Source: Homo sapiens

Method: X-Ray Diffraction

Resolution: 1.85 Å

See all 2 structures...

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Nat Struct Biol. 2001 Aug ;8(8):669-73.

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