7LR1

Crystal structure of GH5_18 from Bifidobacterium longum subsp. longum ATCC 55813

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.139 
  • R-Value Observed: 0.141 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

N-Glycan Degradation Pathways in Gut- and Soil-Dwelling Actinobacteria Share Common Core Genes.

Higgins, M.A., Tegl, G., MacDonald, S.S., Arnal, G., Brumer, H., Withers, S.G., Ryan, K.S.

(2021) ACS Chem Biol 16: 701-711

  • DOI: https://doi.org/10.1021/acschembio.0c00995
  • Primary Citation of Related Structures:  
    7LQX, 7LR1, 7LR2, 7LR6, 7LR7, 7LR8

  • PubMed Abstract: 

    • N-Glycosylation is a fundamental protein modification found in both eukaryotes and archaea. Despite lacking N-glycans, many commensal and pathogenic bacteria have developed mechanisms to degrade these isoforms for a variety of functions, including nutrient acquisition and evasion of the immune system ...

    N-Glycosylation is a fundamental protein modification found in both eukaryotes and archaea. Despite lacking N-glycans, many commensal and pathogenic bacteria have developed mechanisms to degrade these isoforms for a variety of functions, including nutrient acquisition and evasion of the immune system. Although much is known about many of the enzymes responsible for N-glycan degradation, the enzymes involved in cleaving the N-glycan core have only recently been discovered. Thus, some of the structural details have yet to be characterized, and little is known about their full distribution among bacterial strains and specifically within potential Gram-positive polysaccharide utilization loci. Here, we report crystal structures for Family 5, Subfamily 18 (GH5_18) glycoside hydrolases from the gut bacterium Bifidobacterium longum (BlGH5_18) and the soil bacterium Streptomyces cattleya (ScGH5_18), which hydrolyze the core Manβ1-4GlcNAc disaccharide. Structures of these enzymes in complex with Manβ1-4GlcNAc reveal a more complete picture of the -1 subsite. They also show that a C-terminal active site cap present in BlGH5_18 is absent in ScGH5_18. Although this C-terminal cap is not widely distributed throughout the GH5_18 family, it is important for full enzyme activity. In addition, we show that GH5_18 enzymes are found in Gram-positive polysaccharide utilization loci that share common genes, likely dedicated to importing and degrading N-glycan core structures.

    Organizational Affiliation: 

    Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glycosyl hydrolase BlGH5_18
A, B, C, D
446Bifidobacterium longum subsp. longum ATCC 55813Mutation(s): 0 
Gene Names: HMPREF0175_1989
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4
Download Ideal Coordinates CCD File 
BA [auth C]
CA [auth C]
DA [auth C]
E [auth A]
EA [auth C]
BA [auth C],
CA [auth C],
DA [auth C],
E [auth A],
EA [auth C],
F [auth A],
FA [auth C],
G [auth A],
LA [auth D],
MA [auth D],
NA [auth D],
OA [auth D],
PA [auth D],
Q [auth B],
R [auth B]
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
AA [auth B]
GA [auth C]
H [auth A]
HA [auth C]
I [auth A]
AA [auth B],
GA [auth C],
H [auth A],
HA [auth C],
I [auth A],
IA [auth C],
J [auth A],
JA [auth C],
K [auth A],
KA [auth C],
L [auth A],
M [auth A],
N [auth A],
O [auth A],
P [auth A],
QA [auth D],
RA [auth D],
S [auth B],
SA [auth D],
T [auth B],
TA [auth D],
U [auth B],
UA [auth D],
V [auth B],
W [auth B],
X [auth B],
Y [auth B],
Z [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.173 
  • R-Value Work: 0.139 
  • R-Value Observed: 0.141 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.42α = 90
b = 143.73β = 90
c = 155.64γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada--

Revision History  (Full details and data files)

  • Version 1.0: 2021-04-07
    Type: Initial release
  • Version 1.1: 2021-04-28
    Changes: Database references