3L6W

Structure of the collar functional unit (KLH1-H) of keyhole limpet hemocyanin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history

Re-refinement Note

A newer entry is available that reflects an alternative modeling of the original data: 3QJO


Literature

The Cupredoxin-like Domains in Hemocyanins.

Jaenicke, E.Buchler, K.Markl, J.Decker, H.Barends, T.R.M.

(2009) Biochem J 

  • DOI: 10.1042/BJ20091501
  • Primary Citation of Related Structures:  
    3L6W

  • PubMed Abstract: 
  • Haemocyanins are multimeric oxygen transport proteins, which bind oxygen to type 3 copper sites. Arthropod haemocyanins contain 75-kDa subunits, whereas molluscan haemocyanins contain 350-400-kDa subunits comprising seven or eight different 50 kDa FUs (functional units) designated FU-a to FU-h, each with an active site ...

    Haemocyanins are multimeric oxygen transport proteins, which bind oxygen to type 3 copper sites. Arthropod haemocyanins contain 75-kDa subunits, whereas molluscan haemocyanins contain 350-400-kDa subunits comprising seven or eight different 50 kDa FUs (functional units) designated FU-a to FU-h, each with an active site. FU-h possesses a tail of 100 amino acids not present in the other FUs. In the present study we show by X-ray crystallography that in FU-h of KLH1 (keyhole-limpet-haemocyanin isoform 1) the structure of the tail domain is cupredoxin-like but contains no copper. The copper-free domain 3 in arthropod haemocyanin subunits has also recently been reinterpreted as being cupredoxin-like. We propose that the cupredoxin-like domain in both haemocyanin types once served to upload copper to the active site of the oxygen-binding domain.


    Organizational Affiliation

    Institut für Molekulare Biophysik, Johannes Gutenberg-Universität, Jakob Welder Weg 26, 55128 Mainz, Germany. elmar.jaenicke@uni-mainz.de



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemocyanin 1A, B491Megathura crenulataMutation(s): 0 
Gene Names: KLH1
UniProt
Find proteins for Q10583 (Megathura crenulata)
Explore Q10583 
Go to UniProtKB:  Q10583
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ10583
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.00 Å
  • Space Group: I 21 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 251.02α = 90
b = 251.02β = 90
c = 251.02γ = 90
Software Package:
Software NamePurpose
MAR345data collection
PHASERphasing
RESOLVEmodel building
DMmodel building
XDSdata reduction
XSCALEdata scaling
RESOLVEphasing
DMphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description