1SPP

THE CRYSTAL STRUCTURES OF TWO MEMBERS OF THE SPERMADHESIN FAMILY REVEAL THE FOLDING OF THE CUB DOMAIN

• PDB DOI: https://doi.org/10.2210/pdb1SPP/pdb

• Classification: COMPLEX (SEMINAL PLASMA PROTEIN/SPP)
• Organism(s): Sus scrofa
• Mutation(s): No 


• Deposited: 1997-06-19 Released: 1998-06-24 
• Deposition Author(s): Romero, A., Romao, M.J., Varela, P.F., Kolln, I., Dias, J.M., Carvalho, A.L., Sanz, L., Topfer-Petersen, E., Calvete, J.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.259 
• R-Value Work: 0.200 
• R-Value Observed: 0.200 

Literature

The crystal structures of two spermadhesins reveal the CUB domain fold.

Romero, A., Romao, M.J., Varela, P.F., Kolln, I., Dias, J.M., Carvalho, A.L., Sanz, L., Topfer-Petersen, E., Calvete, J.J.

(1997) Nat Struct Biol 4: 783-788

• PubMed: 9334740 
• DOI: https://doi.org/10.1038/nsb1097-783
• Primary Citation of Related Structures:  
  1SFP, 1SPP


• PubMed Abstract: 
  

  Spermadhesins, 12,000-14,000 M(r) mammalian proteins, include lectins involved in sperm-egg binding and display a single CUB domain architecture. We report the crystal structures of porcine seminal plasma PSP-I/PSP-II, a heterodimer of two glycosylated spermadhesins, and bovine aSFP at 2.4 A and 1.9 A resolution respectively.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 24.66 kDa 
• Atom Count: 1,766 
• Modelled Residue Count: 221 
• Deposited Residue Count: 225 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-I	A	109	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P35495 (Sus scrofa) Explore P35495  Go to UniProtKB:  P35495

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
MAJOR SEMINAL PLASMA GLYCOPROTEIN PSP-II	B	116	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P35496 (Sus scrofa) Explore P35496  Go to UniProtKB:  P35496

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.259 
• R-Value Work: 0.200 
• R-Value Observed: 0.200 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 96.37	α = 90
b = 96.37	β = 90
c = 71.32	γ = 120

Software Package:

Software Name	Purpose
MOSFLM	data reduction
ROTAVATA	data reduction
CCP4	model building
PROTEIN	model building
X-PLOR	refinement
CCP4	data scaling
CCP4	phasing
PROTEIN	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-06-24 
Deposition Author(s): Romero, A., Romao, M.J., Varela, P.F., Kolln, I., Dias, J.M., Carvalho, A.L., Sanz, L., Topfer-Petersen, E., Calvete, J.J.

Revision History  

• Version 1.0: 1998-06-24
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance