3L6W

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

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
  • Also Cited By: 3QJO

  • 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 FU ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Hemocyanin 1
A, B
491Megathura crenulataGene Names: KLH1
Find proteins for Q53IP9 (Megathura crenulata)
Go to UniProtKB:  Q53IP9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4 Å
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 251.020α = 90.00
b = 251.020β = 90.00
c = 251.020γ = 90.00
Software Package:
Software NamePurpose
DMmodel building
PHASERphasing
DMphasing
RESOLVEmodel building
XSCALEdata scaling
MAR345data collection
XDSdata reduction
RESOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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