Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 25.51 kDa 
• Atom Count: 1584 
• Residue Count: 199 
• Unique protein chains: 2

2LXM

Lip5-chmp5

• DOI: 10.2210/pdb2LXM/pdb
• BMRB: 18682

• Classification: PROTEIN TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-08-29 Released: 2012-11-28 
• Deposition Author(s): Skalicky, J.J., Sundquist, W.I.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 10 
• Selection Criteria: structures with the least restraint violations 

Literature

Interactions of the Human LIP5 Regulatory Protein with Endosomal Sorting Complexes Required for Transport.

Skalicky, J.J., Arii, J., Wenzel, D.M., Stubblefield, W.M., Katsuyama, A., Uter, N.T., Bajorek, M., Myszka, D.G., Sundquist, W.I.

(2012) J Biol Chem 287: 43910-43926

• PubMed: 23105106 
• DOI: 10.1074/jbc.M112.417899
• Primary Citation of Related Structures:  
  2LXM, 2LXL


• PubMed Abstract: 
  

The endosomal sorting complex required for transport (ESCRT) pathway remodels membranes during multivesicular body biogenesis, the abscission stage of cytokinesis, and enveloped virus budding. The ESCRT-III and VPS4 ATPase complexes catalyze the membrane fission events associated with these processes, and the LIP5 protein helps regulate their interactions by binding directly to a subset of ESCRT-III proteins and to VPS4. We have investigated the biochemical and structural basis for different LIP5-ligand interactions and show that the first microtubule-interacting and trafficking (MIT) module of the tandem LIP5 MIT domain binds CHMP1B (and other ESCRT-III proteins) through canonical type 1 MIT-interacting motif (MIM1) interactions. In contrast, the second LIP5 MIT module binds with unusually high affinity to a novel MIM element within the ESCRT-III protein CHMP5. A solution structure of the relevant LIP5-CHMP5 complex reveals that CHMP5 helices 5 and 6 and adjacent linkers form an amphipathic "leucine collar" that wraps almost completely around the second LIP5 MIT module but makes only limited contacts with the first MIT module. LIP5 binds MIM1-containing ESCRT-III proteins and CHMP5 and VPS4 ligands independently in vitro, but these interactions are coupled within cells because formation of stable VPS4 complexes with both LIP5 and CHMP5 requires LIP5 to bind both a MIM1-containing ESCRT-III protein and CHMP5. Our studies thus reveal how the tandem MIT domain of LIP5 binds different types of ESCRT-III proteins, promoting assembly of active VPS4 enzymes on the polymeric ESCRT-III substrate.

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Organizational Affiliation: 

Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, Utah 84112-5650, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Vacuolar protein sorting-associated protein VTA1 homolog	A	168	Homo sapiens	Mutation(s): 0  Gene Names: C6orf55, HSPC228, My012, VTA1
Find proteins for Q9NP79 (Homo sapiens) Explore Q9NP79  Go to UniProtKB:  Q9NP79
NIH Common Fund Data Resources
PHAROS:  Q9NP79 GTEx:  ENSG00000009844

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Charged multivesicular body protein 5	B	59	Homo sapiens	Mutation(s): 0  Gene Names: C9orf83, CGI-34, CHMP5, HSPC177, PNAS-114, PNAS-2, SNF7DC2
Find proteins for Q9NZZ3 (Homo sapiens) Explore Q9NZZ3  Go to UniProtKB:  Q9NZZ3
NIH Common Fund Data Resources
PHAROS:  Q9NZZ3 GTEx:  ENSG00000086065

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 500 
• Conformers Submitted: 10 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 2LXM Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-08-29 
• Released Date: 2012-11-28 
Deposition Author(s): Skalicky, J.J., Sundquist, W.I.

Revision History 

• Version 1.0: 2012-11-28
  Type: Initial release
  
• Version 1.1: 2013-01-16
  Changes: Database references
• Version 1.2: 2016-04-27
  Changes: Structure summary