1CCD

REFINED STRUCTURE OF RAT CLARA CELL 17 KDA PROTEIN AT 3.0 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Refined structure of rat Clara cell 17 kDa protein at 3.0 A resolution.

Umland, T.C.Swaminathan, S.Furey, W.Singh, G.Pletcher, J.Sax, M.

(1992) J.Mol.Biol. 224: 441-448


  • PubMed Abstract: 
  • The rat Clara cell 17 kDa protein (previously referred to as the rat Clara cell 10 kDa protein) has been reported to inhibit phospholipase A2 and papain, and to also bind progesterone. It has been isolated from rat lung lavage fluid and crystallized ...

    The rat Clara cell 17 kDa protein (previously referred to as the rat Clara cell 10 kDa protein) has been reported to inhibit phospholipase A2 and papain, and to also bind progesterone. It has been isolated from rat lung lavage fluid and crystallized in the space group P6(5)22. The structure has been determined to 3.0 A resolution using the molecular replacement method. Uteroglobin, whose amino acid sequence is 55.7% identical, was used as the search model. The structure was then refined using restrained least-squares and simulated annealing methods. The R-factor is 22.5%. The protein is a covalently bound dimer. Two disulfide bonds join the monomers together in an antiparallel manner such that the dimer encloses a large internal hydrophobic cavity. The hydrophobic cavity is large enough to serve as the progesterone binding site, but access to the cavity is limited. Each monomer is composed of four alpha-helices. The main-chain structure of the Clara cell protein closely resembles that of uteroglobin, but the nature of many of the exposed side-chains differ. This is true, particularly in a hypervariable region between residues 23 and 36, and in the H1H4 pocket.


    Related Citations: 
    • Crystallization and Preliminary X-Ray Study of Rat Clara Cell 10,000 MR Protein
      Swaminathan, S.,Furey, W.,Pletcher, J.,Katyal, S.,Singh, G.,Sax, M.
      (1990) J.Mol.Biol. 211: 17


    Organizational Affiliation

    Biocrystallography Laboratory, VA Medical Center, Pittsburgh, PA 15240.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CLARA CELL 17 kD PROTEIN
A
77Rattus norvegicusGene Names: Scgb1a1 (Cc10, Ugb, Utg)
Find proteins for P17559 (Rattus norvegicus)
Go to UniProtKB:  P17559
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • Space Group: P 65 2 2
Unit Cell:
Length (Å)Angle (°)
a = 52.070α = 90.00
b = 52.070β = 90.00
c = 109.270γ = 120.00
Software Package:
Software NamePurpose
GPRLSArefinement
X-PLORrefinement
X-PLORphasing
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other