BoGH13ASus from Bacteroides ovatus

Experimental Data Snapshot

  • Resolution: 1.89 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.212 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


BoGH13A Sus from Bacteroides ovatus represents a novel alpha-amylase used for Bacteroides starch breakdown in the human gut.

Brown, H.A.DeVeaux, A.L.Juliano, B.R.Photenhauer, A.L.Boulinguiez, M.Bornschein, R.E.Wawrzak, Z.Ruotolo, B.T.Terrapon, N.Koropatkin, N.M.

(2023) Cell Mol Life Sci 80: 232-232

  • DOI: https://doi.org/10.1007/s00018-023-04812-w
  • Primary Citation of Related Structures:  
    8DGE, 8DL1, 8DL2

  • PubMed Abstract: 

    Members of the Bacteroidetes phylum in the human colon deploy an extensive number of proteins to capture and degrade polysaccharides. Operons devoted to glycan breakdown and uptake are termed polysaccharide utilization loci or PUL. The starch utilization system (Sus) is one such PUL and was initially described in Bacteroides thetaiotaomicron (Bt). BtSus is highly conserved across many species, except for its extracellular α-amylase, SusG. In this work, we show that the Bacteroides ovatus (Bo) extracellular α-amylase, BoGH13A Sus , is distinguished from SusG in its evolutionary origin and its domain architecture and by being the most prevalent form in Bacteroidetes Sus. BoGH13A Sus is the founding member of both a novel subfamily in the glycoside hydrolase family 13, GH13_47, and a novel carbohydrate-binding module, CBM98. The BoGH13A Sus CBM98-CBM48-GH13_47 architecture differs from the CBM58 embedded within the GH13_36 of SusG. These domains adopt a distinct spatial orientation and invoke a different association with the outer membrane. The BoCBM98 binding site is required for Bo growth on polysaccharides and optimal enzymatic degradation thereof. Finally, the BoGH13A Sus structure features bound Ca 2+ and Mn 2+ ions, the latter of which is novel for an α-amylase. Little is known about the impact of Mn 2+ on gut bacterial function, much less on polysaccharide consumption, but Mn 2+ addition to Bt expressing BoGH13A Sus specifically enhances growth on starch. Further understanding of bacterial starch degradation signatures will enable more tailored prebiotic and pharmaceutical approaches that increase starch flux to the gut.

  • Organizational Affiliation

    Department of Chemistry, University of Michigan, Ann Arbor, MI, 48109, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha amylase, catalytic domain protein
A, B, C, D
738Bacteroides ovatus ATCC 8483Mutation(s): 0 
Gene Names: BACOVA_03514Bovatus_03803
Find proteins for A7M087 (Bacteroides ovatus (strain ATCC 8483 / DSM 1896 / JCM 5824 / BCRC 10623 / CCUG 4943 / NCTC 11153))
Explore A7M087 
Go to UniProtKB:  A7M087
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA7M087
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 7 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on PGE

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C6 H14 O4
Query on MPD

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TC [auth C],
UC [auth C]
C6 H14 O2
Query on PEG

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IA [auth A]
JA [auth A]
JD [auth D]
KA [auth A]
KB [auth B]
IA [auth A],
JA [auth A],
JD [auth D],
KA [auth A],
KB [auth B],
KD [auth D],
LB [auth B],
LD [auth D],
MB [auth B],
SC [auth C]
C4 H10 O3
Query on IMD

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ID [auth D],
MD [auth D]
C3 H5 N2
Query on EDO

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AA [auth A]
AB [auth B]
AC [auth C]
AD [auth D]
BA [auth A]
AA [auth A],
AB [auth B],
AC [auth C],
AD [auth D],
BA [auth A],
BB [auth B],
BC [auth C],
BD [auth D],
CA [auth A],
CB [auth B],
CC [auth C],
CD [auth D],
DA [auth A],
DB [auth B],
DC [auth C],
DD [auth D],
EA [auth A],
EB [auth B],
EC [auth C],
ED [auth D],
FA [auth A],
FB [auth B],
FC [auth C],
FD [auth D],
G [auth A],
GA [auth A],
GB [auth B],
GC [auth C],
GD [auth D],
H [auth A],
HA [auth A],
HB [auth B],
HC [auth C],
HD [auth D],
I [auth A],
IB [auth B],
IC [auth C],
J [auth A],
JB [auth B],
JC [auth C],
K [auth A],
KC [auth C],
L [auth A],
LC [auth C],
M [auth A],
MC [auth C],
N [auth A],
NC [auth C],
ND [auth D],
O [auth A],
OA [auth B],
OC [auth C],
P [auth A],
PA [auth B],
PB [auth C],
PC [auth C],
Q [auth A],
QA [auth B],
QB [auth C],
QC [auth C],
R [auth A],
RA [auth B],
RB [auth C],
RC [auth C],
S [auth A],
SA [auth B],
SB [auth C],
T [auth A],
TA [auth B],
TB [auth C],
U [auth A],
UA [auth B],
UB [auth C],
V [auth A],
VA [auth B],
VB [auth C],
W [auth A],
WA [auth B],
WB [auth C],
X [auth A],
XA [auth B],
XB [auth C],
XC [auth D],
Y [auth A],
YA [auth B],
YB [auth C],
YC [auth D],
Z [auth A],
ZA [auth B],
ZB [auth C],
ZC [auth D]
C2 H6 O2
Query on MN

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F [auth A],
NA [auth B],
OB [auth C],
WC [auth D]
Query on CA

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E [auth A],
MA [auth B],
NB [auth C],
VC [auth D]
Experimental Data & Validation

Experimental Data

  • Resolution: 1.89 Å
  • R-Value Free: 0.271 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.212 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.387α = 90
b = 148.443β = 91
c = 112.77γ = 90
Software Package:
Software NamePurpose
xia2data scaling
PDB_EXTRACTdata extraction
xia2data reduction

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesGM118475
National Institutes of Health/National Center for Complementary and Integrative Health (NIH/NCCIH)United StatesAT011278

Revision History  (Full details and data files)

  • Version 1.0: 2023-05-24
    Type: Initial release
  • Version 1.1: 2023-09-20
    Changes: Data collection, Database references
  • Version 1.2: 2023-10-25
    Changes: Refinement description