Macromolecule Content

• Total Structure Weight: 18.01 kDa 
• Atom Count: 1263 
• Modelled Residue Count: 161 
• Deposited Residue Count: 161 
• Unique protein chains: 1

2KIG

A PH domain within OCRL bridges clathrin mediated membrane trafficking to phosphoinositide metabolism

• DOI: 10.2210/pdb2KIG/pdb
• BMRB: 16273

• Classification: ENDOCYTOSIS, HYDROLASE
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2009-05-03 Released: 2009-06-30 
• Deposition Author(s): Mao, Y., Hodsdon, M.E., De Camilli, P.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

A PH domain within OCRL bridges clathrin-mediated membrane trafficking to phosphoinositide metabolism.

Mao, Y., Balkin, D.M., Zoncu, R., Erdmann, K.S., Tomasini, L., Hu, F., Jin, M.M., Hodsdon, M.E., De Camilli, P.

(2009) EMBO J 28: 1831-1842

• PubMed: 19536138 
• DOI: 10.1038/emboj.2009.155
• Primary Citation of Related Structures:  
  2KIE, 2KIG


• PubMed Abstract: 
  

OCRL, whose mutations are responsible for Lowe syndrome and Dent disease, and INPP5B are two similar proteins comprising a central inositol 5-phosphatase domain followed by an ASH and a RhoGAP-like domain. Their divergent NH2-terminal portions remain uncharacterized. We show that the NH2-terminal region of OCRL, but not of INPP5B, binds clathrin heavy chain. OCRL, which in contrast to INPP5B visits late stage endocytic clathrin-coated pits, was earlier shown to contain another binding site for clathrin in its COOH-terminal region. NMR structure determination further reveals that despite their primary sequence dissimilarity, the NH2-terminal portions of both OCRL and INPP5B contain a PH domain. The novel clathrin-binding site in OCRL maps to an unusual clathrin-box motif located in a loop of the PH domain, whose mutations reduce recruitment efficiency of OCRL to coated pits. These findings suggest an evolutionary pressure for a specialized function of OCRL in bridging phosphoinositide metabolism to clathrin-dependent membrane trafficking.

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Organizational Affiliation: 

Department of Cell Biology, Howard Hughes Medical Institute, Yale University, New Haven, CT 06511, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Inositol polyphosphate 5-phosphatase II isoform	A	161	Mus musculus	Mutation(s): 0  Gene Names: Inpp5b EC: 3.1.3.36
UniProt
Find proteins for Q8K337 (Mus musculus) Explore Q8K337  Go to UniProtKB:  Q8K337

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 200 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 
• OLDERADO: 2KIG Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-05-03 
• Released Date: 2009-06-30 
Deposition Author(s): Mao, Y., Hodsdon, M.E., De Camilli, P.

Revision History  

• Version 1.0: 2009-06-30
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance