1M6P image
Entry Detail
PDB ID:
1M6P
Keywords:
Title:
EXTRACYTOPLASMIC DOMAIN OF BOVINE CATION-DEPENDENT MANNOSE 6-PHOSPHATE RECEPTOR
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
1998-04-19
Release Date:
1999-04-27
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.27
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 43 21 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:CATION-DEPENDENT MANNOSE-6-PHOSPHATE RECEPTOR
Mutations:N31Q, N57Q, N68Q, N87Q
Chain IDs:A, B
Chain Length:152
Number of Molecules:2
Biological Source:Bos taurus
Primary Citation
Molecular basis of lysosomal enzyme recognition: three-dimensional structure of the cation-dependent mannose 6-phosphate receptor.
Cell(Cambridge,Mass.) 93 639 648 (1998)
PMID: 9604938 DOI: 10.1016/S0092-8674(00)81192-7

Abstact

Targeting of newly synthesized lysosomal hydrolases to the lysosome is mediated by the cation-dependent mannose 6-phosphate receptor (CD-MPR) and the insulin-like growth factor II/cation-independent mannose 6-phosphate receptor (IGF-II/CI-MPR). The two receptors, which share sequence similarities, constitute the P-type family of animal lectins. We now report the three-dimensional structure of a glycosylation-deficient, yet fully functional form of the extracytoplasmic domain of the bovine CD-MPR (residues 3-154) complexed with mannose 6-phosphate at 1.8 A resolution. The extracytoplasmic domain of the CD-MPR crystallizes as a dimer, and each monomer folds into a nine-stranded flattened beta barrel, which bears a striking resemblance to avidin. The distance of 40 A between the two ligand-binding sites of the dimer provides a structural basis for the observed differences in binding affinity exhibited by the CD-MPR toward various lysosomal enzymes.

Legend

Protein

Chemical

Disease

Primary Citation of related structures