Biological Assembly 1  

 3D View: Structure | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 49.21 kDa 
• Atom Count: 3230 
• Modelled Residue Count: 394 
• Deposited Residue Count: 426 
• Unique protein chains: 1

1UWY

Crystal structure of human carboxypeptidase M

• DOI: 10.2210/pdb1UWY/pdb

• Classification: HYDROLASE
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2004-02-17 Released: 2004-04-08 
• Deposition Author(s): Maskos, K., Reverter, D., Bode, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.286 
• R-Value Work: 0.206 
• R-Value Observed: 0.206 

Literature

Crystal Structure of Human Carboxypeptidase M, a Membrane-Bound Enzyme that Regulates Peptide Hormone Activity

Reverter, D., Maskos, K., Tan, F., Skidgel, R., Bode, W.

(2004) J Mol Biol 338: 257

• PubMed: 15066430 
• DOI: 10.1016/j.jmb.2004.02.058
• Primary Citation of Related Structures:  
  1UWY


• PubMed Abstract: 
  

Carboxypeptidase M (CPM), an extracellular glycosylphosphatidyl-inositol(GPI)-anchored membrane glycoprotein belonging to the CPN/E subfamily of "regulatory" metallo-carboxypeptidases, specifically removes C-terminal basic residues from peptides and proteins. Due to its wide distribution in human tissues, CPM is believed to play important roles in the control of peptide hormone and growth factor activity at the cell surface, and in the membrane-localized degradation of extracellular proteins. We have crystallized human GPI-free CPM, and have determined and refined its 3.0A crystal structure. The structure analysis reveals that CPM consists of a 295 residue N-terminal catalytic domain similar to that of duck CPD-2 (but only distantly related to CPA/B), an adjacent 86 residue beta-sandwich C-terminal domain characteristic of the CPN/E family but more conically shaped than the equivalent domain in CPD-2, and a unique, partially disordered 25 residue C-terminal extension to which the GPI membrane-anchor is post-translationally attached. Through this GPI anchor, and presumably via some positively charged side-chains of the C-terminal domain, the CPM molecule may interact with the membrane in such a way that its active centre will face alongside, i.e. well suited to interact with other membrane-bound protein substrates or small peptides. Modelling of the C-terminal part of the natural substrate Arg(6)-Met-enkephalin into the active site shows that the S1' pocket of CPM is particularly well designed to accommodate P1'-Arg residues, in agreement with the preference of CPM for cleaving C-terminal Arg.

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Organizational Affiliation: 

Abteilung für Strukturforschung, Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, D-82152 Planegg-Martinsried, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CARBOXYPEPTIDASE M	A	426	Homo sapiens	Mutation(s): 0  Gene Names: CPM EC: 3.4.17.12
Find proteins for P14384 (Homo sapiens) Explore P14384  Go to UniProtKB:  P14384
NIH Common Fund Data Resources
PHAROS:  P14384 GTEx:  ENSG00000135678

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	B	2		N-Glycosylation

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	C [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.00 Å
• R-Value Free: 0.286 
• R-Value Work: 0.206 
• R-Value Observed: 0.206 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 85.83	α = 90
b = 85.83	β = 90
c = 124.54	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-02-17 
• Released Date: 2004-04-08 
Deposition Author(s): Maskos, K., Reverter, D., Bode, W.

Revision History  

• Version 1.0: 2004-04-08
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary