5AY9

Crystal structure of Ruminococcus albus 4-O-beta-D-mannosyl-D-glucose phosphorylase (RaMP1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 

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This is version 1.2 of the entry. See complete history


Literature

Structural insights into the difference in substrate recognition of two mannoside phosphorylases from two GH130 subfamilies

Ye, Y.Saburi, W.Odaka, R.Kato, K.Sakurai, N.Komoda, K.Nishimoto, M.Kitaoka, M.Mori, H.Yao, M.

(2016) FEBS Lett 590: 828-837

  • DOI: 10.1002/1873-3468.12105
  • Primary Citation of Related Structures:  
    5AY9, 5AYC, 5AYD, 5AYE

  • PubMed Abstract: 
  • In Ruminococcus albus, 4-O-β-D-mannosyl-D-glucose phosphorylase (RaMP1) and β-(1,4)-mannooligosaccharide phosphorylase (RaMP2) belong to two subfamilies of glycoside hydrolase family 130. The two enzymes phosphorolyze β-mannosidic linkages at the nonreducing ends of their substrates, and have substantially diverse substrate specificity ...

    In Ruminococcus albus, 4-O-β-D-mannosyl-D-glucose phosphorylase (RaMP1) and β-(1,4)-mannooligosaccharide phosphorylase (RaMP2) belong to two subfamilies of glycoside hydrolase family 130. The two enzymes phosphorolyze β-mannosidic linkages at the nonreducing ends of their substrates, and have substantially diverse substrate specificity. The differences in their mechanism of substrate binding have not yet been fully clarified. In the present study, we report the crystal structures of RaMP1 with/without 4-O-β-D-mannosyl-d-glucose and RaMP2 with/without β-(1→4)-mannobiose. The structures of the two enzymes differ at the +1 subsite of the substrate-binding pocket. Three loops are proposed to determine the different substrate specificities. One of these loops is contributed from the adjacent molecule of the oligomer structure. In RaMP1, His245 of loop 3 forms a hydrogen-bond network with the substrate through a water molecule, and is indispensible for substrate binding.


    Organizational Affiliation

    Department of Pharmacology, Basic Medical College of Zhengzhou University, Zhengzhou, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
4-O-beta-D-mannosyl-D-glucose phosphorylaseA386Ruminococcus albus 7 = DSM 20455Mutation(s): 0 
Gene Names: Rumal_0852
EC: 2.4.1.281
UniProt
Find proteins for E6UIS7 (Ruminococcus albus (strain ATCC 27210 / DSM 20455 / JCM 14654 / NCDO 2250 / 7))
Explore E6UIS7 
Go to UniProtKB:  E6UIS7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupE6UIS7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.241 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.9α = 90
b = 88.9β = 90
c = 286.857γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
Cootmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-23
    Type: Initial release
  • Version 1.1: 2016-04-06
    Changes: Database references
  • Version 1.2: 2020-02-26
    Changes: Data collection, Database references, Derived calculations