6B3I

Annexin A13a


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

An alternative N-terminal fold of the intestine-specific annexin A13a induces dimerization and regulates membrane-binding.

McCulloch, K.M.Yamakawa, I.Shifrin Jr., D.A.McConnell, R.E.Foegeding, N.J.Singh, P.K.Mao, S.Tyska, M.J.Iverson, T.M.

(2019) J Biol Chem 294: 3454-3463

  • DOI: 10.1074/jbc.RA118.004571
  • Primary Citation of Related Structures:  
    6B3I

  • PubMed Abstract: 
  • Annexin proteins function as Ca 2+ -dependent regulators of membrane trafficking and repair that may also modulate membrane curvature. Here, using high-resolution confocal imaging, we report that the intestine-specific annexin A13 (ANX A13 ...

    Annexin proteins function as Ca 2+ -dependent regulators of membrane trafficking and repair that may also modulate membrane curvature. Here, using high-resolution confocal imaging, we report that the intestine-specific annexin A13 (ANX A13) localizes to the tips of intestinal microvilli and determined the crystal structure of the ANX A13a isoform to 2.6 Å resolution. The structure revealed that the N terminus exhibits an alternative fold that converts the first two helices and the associated helix-loop-helix motif into a continuous α-helix, as stabilized by a domain-swapped dimer. We also found that the dimer is present in solution and partially occludes the membrane-binding surfaces of annexin, suggesting that dimerization may function as a means for regulating membrane binding. Accordingly, as revealed by in vitro binding and cellular localization assays, ANX A13a variants that favor a monomeric state exhibited increased membrane association relative to variants that favor the dimeric form. Together, our findings support a mechanism for how the association of the ANX A13a isoform with the membrane is regulated.


    Organizational Affiliation

    the Vanderbilt Institute of Chemical Biology, Vanderbilt University, Nashville, Tennessee 37232.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AnnexinABC343Homo sapiensMutation(s): 0 
Gene Names: ANXA13ANX13
Find proteins for P27216 (Homo sapiens)
Explore P27216 
Go to UniProtKB:  P27216
NIH Common Fund Data Resources
PHAROS  P27216
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download CCD File 
A, B, C
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.193 
  • R-Value Observed: 0.195 
  • Space Group: C 1 2 1
  • Diffraction Data DOI: 10.15785/SBGRID/353 SBGrid
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 190.623α = 90
b = 93.815β = 106.02
c = 94.858γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK)United StatesP30DK058404

Revision History 

  • Version 1.0: 2018-10-10
    Type: Initial release
  • Version 1.1: 2019-04-24
    Changes: Data collection, Database references, Structure summary
  • Version 1.2: 2019-12-25
    Changes: Author supporting evidence