2CAZ image
Entry Detail
PDB ID:
2CAZ
Keywords:
PROTEIN TRANSPORT
Title:
ESCRT-I core
Biological Source:
Source Organism:
SACCHAROMYCES CEREVISIAE
Host Organism:
ESCHERICHIA COLI
PDB Version:
Deposition Date:
2005-12-23
Release Date:
2006-04-07
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.60 Å
R-Value Free:
0.35
R-Value Work:
0.32
R-Value Observed:
0.32
Space Group:
P 61
2CAZ validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:SUPPRESSOR PROTEIN STP22 OF TEMPERATURE-SENSITIVE ALPHA-FACTOR RECEPTOR AND ARGININE PERMEASE
Chain IDs:A, D
Chain Length:82
Number of Molecules:2
Biological Source:SACCHAROMYCES CEREVISIAE
UniProt ID:P25604 Pfam ID:PF09454
Protein Blast
Polymer Type:polypeptide(L)
Description:VACUOLAR PROTEIN SORTING-ASSOCIATED PROTEIN VPS28
Chain IDs:B, E
Chain Length:155
Number of Molecules:2
Biological Source:SACCHAROMYCES CEREVISIAE
UniProt ID:Q02767 Pfam ID:PF03997
Protein Blast
Polymer Type:polypeptide(L)
Description:PROTEIN SRN2
Chain IDs:C, F
Chain Length:85
Number of Molecules:2
Biological Source:SACCHAROMYCES CEREVISIAE
UniProt ID:Q99176 Pfam ID:PF07200
Ligand Molecules
NA
Primary Citation
Escrt-I Core and Escrt-II Glue Domain Structures Reveal Role for Glue in Linking to Escrt-I and Membranes.
Cell(Cambridge,Mass.) 125 99 ? (2006)
PMID: 16615893 DOI: 10.1016/J.CELL.2006.01.047

Abstact

ESCRT complexes form the main machinery driving protein sorting from endosomes to lysosomes. Currently, the picture regarding assembly of ESCRTs on endosomes is incomplete. The structure of the conserved heterotrimeric ESCRT-I core presented here shows a fan-like arrangement of three helical hairpins, each corresponding to a different subunit. Vps23/Tsg101 is the central hairpin sandwiched between the other subunits, explaining the critical role of its "steadiness box" in the stability of ESCRT-I. We show that yeast ESCRT-I links directly to ESCRT-II, through a tight interaction of Vps28 (ESCRT-I) with the yeast-specific zinc-finger insertion within the GLUE domain of Vps36 (ESCRT-II). The crystal structure of the GLUE domain missing this insertion reveals it is a split PH domain, with a noncanonical lipid binding pocket that binds PtdIns3P. The simultaneous and reinforcing interactions of ESCRT-II GLUE domain with membranes, ESCRT-I, and ubiquitin are critical for ubiquitinated cargo progression from early to late endosomes.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1UZX