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 1.2 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: 10.1021/bi960821+
  • Primary Citation of Related Structures:  1PEH

  • 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 ...

    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.


    Related Citations: 
    • Membrane-Binding Amphipathic Alpha-Helical Peptide Derived from Ctp:Phosphocholine Cytidylyltransferase
      Johnson, J.E.,Cornell, R.B.
      (1994) Biochemistry 33: 4327


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PEPC22
A
24Rattus norvegicusGene Names: Pcyt1a (Ctpct, Pcyt1)
EC: 2.7.7.15
Find proteins for P19836 (Rattus norvegicus)
Go to UniProtKB:  P19836
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

--

ACE
Query on ACE
A
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 10 
  • Selection Criteria: ALL SUBMITTED 
  • Olderado: 1PEI Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance