1PEI

NMR STRUCTURE OF THE MEMBRANE-BINDING DOMAIN OF CTP PHOSPHOCHOLINE CYTIDYLYLTRANSFERASE, 10 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 10 
  • Selection Criteria: ALL SUBMITTED 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of the membrane binding domain of CTP:phosphocholine cytidylyltransferase.

Dunne, S.J.Cornell, R.B.Johnson, J.E.Glover, N.R.Tracey, A.S.

(1996) Biochemistry 35: 11975-11984

  • DOI: https://doi.org/10.1021/bi960821+
  • Primary Citation of Related Structures:  
    1PEH, 1PEI

  • PubMed Abstract: 

    It has been proposed that the domain of the regulatory enzyme, CTP:phosphocholine cytidylyltransferase, which mediates reversible binding of the enzyme to membranes, is an amphipathic alpha-helix of approximately 60 amino acid residues and that this domain is adjacent to the putative active site domain of this enzyme. Circular dichroism indicated that the secondary structures of two overlapping peptides spanning this region were predominantly alpha-helical in the presence of PG vesicles or sodium dodecyl sulfate micelles. Interproton distances were obtained from two-dimensional NMR spectroscopic measurements to solve the structures of these two peptides. The C-terminal 22 amino acid peptide segment (corresponding to Val267-Ser288) was a well-defined alpha-helix over its length. The N-terminal 33-mer (corresponding to Asn236-Glu268) was composed of an alpha-helix from Glu243 to Lys266, a well-structured bend of about 50 degrees at Tyr240-His241-Leu242, and an N-terminal four-residue helix. It is proposed that the three residues involved in generating the bend act as the hinge between the catalytic and regulatory domains. The nonpolar faces of the 33-mer and 22-mer were interrupted by Ser260, Ser271, and Ser282. These residues may serve to limit the hydrophobicity and facilitate reversible and lipid-selective membrane binding. The hydrophobic faces of the helices were flanked by a set of basic amino acid residues on one side and basic amino acid residues interspersed with glutamates on the other. The disposition of these side chains gives clues to the basis for the specificities of these peptides for anionic surfaces.


  • Organizational Affiliation

    Department of Chemistry and Institute of Molecular Biology, Simon Fraser University, Burnaby, BC, Canada.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PEPC2224Rattus norvegicusMutation(s): 0 
EC: 2.7.7.15
Membrane Entity: Yes 
UniProt
Find proteins for P19836 (Rattus norvegicus)
Explore P19836 
Go to UniProtKB:  P19836
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19836
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 10 
  • Selection Criteria: ALL SUBMITTED 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-03-14
    Changes: Data collection, Database references, Derived calculations, Other, Source and taxonomy, Structure summary