2NX7

Structure of NOWA cysteine rich domain 8


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Sequence-structure and structure-function analysis in cysteine-rich domains forming the ultrastable nematocyst wall.

Meier, S.Jensen, P.R.Adamczyk, P.Bachinger, H.P.Holstein, T.W.Engel, J.Ozbek, S.Grzesiek, S.

(2007) J.Mol.Biol. 368: 718-728

  • DOI: 10.1016/j.jmb.2007.02.026
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The nematocyst wall of cnidarians is a unique biomaterial that withstands extreme osmotic pressures, allowing an ultrafast discharge of the nematocyst capsules. Assembly of the highly robust nematocyst wall is achieved by covalent linkage of cysteine ...

    The nematocyst wall of cnidarians is a unique biomaterial that withstands extreme osmotic pressures, allowing an ultrafast discharge of the nematocyst capsules. Assembly of the highly robust nematocyst wall is achieved by covalent linkage of cysteine-rich domains (CRDs) from two main protein components, minicollagens and nematocyst outer wall antigen (NOWA). The bipolar minicollagens have different disulfide patterns and topologies in their N and C-terminal CRDs. The functional significance of this polarity has been elusive. Here, we show by NMR structural analysis that all representative cysteine-rich domains of NOWA are structurally related to N-terminal minicollagen domains. Natural sequence insertions in NOWA CRDs have very little effect on the tightly knit domain structures, nor do they preclude the efficient folding to a single native conformation. The different folds in NOWA CRDs and the atypical C-terminal minicollagen domain on the other hand can be directly related to different conformational preferences in the reduced states. Ultrastructural analysis in conjunction with aggregation studies argues for an association between the similar NOWA and N-terminal minicollagen domains in early stages of the nematocyst wall assembly, which is followed by the controlled association between the unusual structures of C-terminal minicollagen domains.


    Organizational Affiliation

    Department of Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland. smeier@aki.ku.dk




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Nematocyst outer wall antigen
A
28Hydra vulgarisMutation(s): 0 
Gene Names: NOWA
Find proteins for Q8IT70 (Hydra vulgaris)
Go to UniProtKB:  Q8IT70
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 
  • Olderado: 2NX7 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-10-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance