1ky2
From Proteopedia
GPPNHP-BOUND YPT7P AT 1.6 A RESOLUTION
Structural highlights
FunctionYPT7_YEAST Needed for homotypic vacuole fusion, the last step in the vacuole inheritance process. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe GTPase Ypt7p from S. cerevisiae is involved in late endosome-to-vacuole transport and homotypic vacuole fusion. We present crystal structures of the GDP- and GppNHp-bound conformation of Ypt7p solved at 1.35 and 1.6 A resolution, respectively. Despite the similarity of the overall structure to other Ypt/Rab proteins, Ypt7p displays small but significant differences. The Ypt7p-specific residues Tyr33 and Tyr37 cause a difference in the main chain trace of the RabSF2 region and form a characteristic surface epitope. Ypt7p*GppNHp does not display the helix alpha2, characteristic of the Ras-superfamily, but instead possess an extended loop L4/L5. Due to insertions in loops L3 and L7, the neighboring RabSF1 and RabSF4 regions are different in their conformations to those of other Ypt/Rab proteins. Rab-subfamily-specific regions of Ypt7p are structurally different from other RabGTPases.,Constantinescu AT, Rak A, Alexandrov K, Esters H, Goody RS, Scheidig AJ Structure. 2002 Apr;10(4):569-79. PMID:11937061[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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