7JTZ

Yeast Glo3 GAP domain

7JTZ の概要

• エントリーDOI: 10.2210/pdb7jtz/pdb
• 分子名称: ADP-ribosylation factor GTPase-activating protein GLO3, ZINC ION, GLYCEROL, ... (4 entities in total)
• 機能のキーワード: arfgap domain, gtpase activating protein domain, membrane trafficking, copi, protein transport
• 由来する生物種: Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (Baker's yeast)
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 71418.95

構造登録者

Xie, B.,Jackson, L.P. (登録日: 2020-08-18, 公開日: 2021-03-24, 最終更新日: 2023-10-18)

主引用文献

Xie, B.,Jung, C.,Chandra, M.,Engel, A.,Kendall, A.K.,Jackson, L.P.
The Glo3 GAP crystal structure supports the molecular niche model for ArfGAPs in COPI coats.
Adv Biol Regul, 79:100781-100781, 2021

PubMed Abstract: Arf GTPase activating (ArfGAP) proteins are critical regulatory and effector proteins in membrane trafficking pathways. Budding yeast contain two ArfGAP proteins (Gcs1 and Glo3) implicated in COPI coat function at the Golgi, and yeast require Glo3 catalytic function for viability. A new X-ray crystal structure of the Glo3 GAP domain was determined at 2.1 Å resolution using molecular replacement methods. The structure reveals a Cys-family zinc finger motif with an invariant residue (R59) positioned to act as an "arginine finger" during catalysis. Comparisons among eukaryotic GAP domains show a key difference between ArfGAP1 and ArfGAP2/3 family members in the final helix located within the domain. Conservation at both the sequence and structural levels suggest the Glo3 GAP domain interacts with yeast Arf1 switch I and II regions to promote catalysis. Together, the structural data presented here provide additional evidence for placing Glo3 near Arf1 triads within membrane-assembled COPI coats and further support the molecular niche model for COPI coat regulation by ArfGAPs.

PubMed: 33436318
DOI: 10.1016/j.jbior.2020.100781

実験手法

X-RAY DIFFRACTION (2.07 Å)