1CCD

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Observed: 0.225 

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

  • DOI: 10.1016/0022-2836(92)91006-b
  • Primary Citation of Related Structures:  
    1CCD

  • 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 in the space group P6(5)22 ...

    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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CLARA CELL 17 kD PROTEINA77Rattus rattusMutation(s): 0 
UniProt
Find proteins for P17559 (Rattus norvegicus)
Explore P17559 
Go to UniProtKB:  P17559
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17559
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download Ideal Coordinates CCD File 
B [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Observed: 0.225 
  • Space Group: P 65 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.07α = 90
b = 52.07β = 90
c = 109.27γ = 120
Software Package:
Software NamePurpose
X-PLORmodel building
GPRLSArefinement
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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