Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 17.09 kDa 
• Atom Count: 1,090 
• Modelled Residue Count: 134 
• Deposited Residue Count: 156 
• Unique protein chains: 1

 7LXF

ENAH EVH1 domain bound to peptide from protein PCARE

• PDB DOI: 10.2210/pdb7LXF/pdb

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


• Deposited: 2021-03-03 Released: 2021-11-24 
• Deposition Author(s): Hwang, T., Grant, R.A., Keating, A.E.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.234 
• R-Value Work: 0.217 
• R-Value Observed: 0.218 

Literature

A distributed residue network permits conformational binding specificity in a conserved family of actin remodelers.

Hwang, T., Parker, S.S., Hill, S.M., Ilunga, M.W., Grant, R.A., Mouneimne, G., Keating, A.E.

(2021) Elife 10

• PubMed: 34854809 
• DOI: 10.7554/eLife.70601
• Primary Citation of Related Structures:  
  7LXF


• PubMed Abstract: 
  

Metazoan proteomes contain many paralogous proteins that have evolved distinct functions. The Ena/VASP family of actin regulators consists of three members that share an EVH1 interaction domain with a 100 % conserved binding site. A proteome-wide screen revealed photoreceptor cilium actin regulator (PCARE) as a high-affinity ligand for ENAH EVH1. Here, we report the surprising observation that PCARE is ~100-fold specific for ENAH over paralogs VASP and EVL and can selectively bind ENAH and inhibit ENAH-dependent adhesion in cells. Specificity arises from a mechanism whereby PCARE stabilizes a conformation of the ENAH EVH1 domain that is inaccessible to family members VASP and EVL. Structure-based modeling rapidly identified seven residues distributed throughout EVL that are sufficient to differentiate binding by ENAH vs. EVL. By exploiting the ENAH-specific conformation, we rationally designed the tightest and most selective ENAH binder to date. Our work uncovers a conformational mechanism of interaction specificity that distinguishes highly similar paralogs and establishes tools for dissecting specific Ena/VASP functions in processes including cancer cell invasion.

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Organizational Affiliation: 

Department of Biological Engineering and Koch Institue for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, United States.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein enabled homolog,Photoreceptor cilium actin regulator	A	156	Homo sapiens	Mutation(s): 0  Gene Names: ENAH, PCARE, C2orf71
UniProt & NIH Common Fund Data Resources
Find proteins for A6NGG8 (Homo sapiens) Explore A6NGG8  Go to UniProtKB:  A6NGG8
PHAROS:  A6NGG8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.234 
• R-Value Work: 0.217 
• R-Value Observed: 0.218 
• Space Group: P 6₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 52.12	α = 90
b = 52.12	β = 90
c = 197.85	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XSCALE	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-11-24 
Deposition Author(s): Hwang, T., Grant, R.A., Keating, A.E.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM129007-03

Revision History  

• Version 1.0: 2021-11-24
  Type: Initial release
  
• Version 1.1: 2022-06-08
  Changes: Database references