skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Galactomannan utilization by Cellvibrio japonicus relies on a single essential α‐galactosidase encoded by the aga27A gene

Journal Article · · Molecular Microbiology
DOI:https://doi.org/10.1111/mmi.15024· OSTI ID:1914357

Abstract Plant mannans are a component of lignocellulose that can have diverse compositions in terms of its backbone and side‐chain substitutions. Consequently, the degradation of mannan substrates requires a cadre of enzymes for complete reduction to substituent monosaccharides that can include mannose, galactose, and/or glucose. One bacterium that possesses this suite of enzymes is the Gram‐negative saprophyte Cellvibrio japonicus , which has 10 predicted mannanases from the Glycoside Hydrolase (GH) families 5, 26, and 27. Here we describe a systems biology approach to identify and characterize the essential mannan‐degrading components in this bacterium. The transcriptomic analysis uncovered significant changes in gene expression for most mannanases, as well as many genes that encode carbohydrate active enzymes (CAZymes) when mannan was actively being degraded. A comprehensive mutational analysis characterized 54 CAZyme‐encoding genes in the context of mannan utilization. Growth analysis of the mutant strains found that the man26C , aga27A , and man5D genes, which encode a mannobiohydrolase, α‐galactosidase, and mannosidase, respectively, were important for the deconstruction of galactomannan, with Aga27A being essential. Our updated model of mannan degradation in C. japonicus proposes that the removal of galactose sidechains from substituted mannans constitutes a crucial step for the complete degradation of this hemicellulose.

Sponsoring Organization:
USDOE
OSTI ID:
1914357
Journal Information:
Molecular Microbiology, Journal Name: Molecular Microbiology Vol. 119 Journal Issue: 3; ISSN 0950-382X
Publisher:
Wiley-BlackwellCopyright Statement
Country of Publication:
FAO
Language:
English

References (61)

In-Frame Deletions Allow Functional Characterization of Complex Cellulose Degradation Phenotypes in Cellvibrio japonicus journal June 2015
Functional reassignment of Cellvibrio vulgaris EpiA to cellobiose 2-epimerase and an evaluation of the biochemical functions of the 4-O-β-d-mannosyl-d-glucose phosphorylase-like protein, UnkA journal June 2015
Microbial carbohydrate esterases deacetylating plant polysaccharides journal November 2012
Analysis of Active Site Architecture and Reaction Product Linkage Chemistry Reveals a Conserved Cleavage Substrate for an Endo-alpha-mannanase within Diverse Yeast Mannans journal February 2020
The complex physiology of Cellvibrio japonicus xylan degradation relies on a single cytoplasmic β-xylosidase for xylo-oligosaccharide utilization : Xylan degradation in journal January 2018
Systems analysis in Cellvibrio japonicus resolves predicted redundancy of β-glucosidases and determines essential physiological functions : Functional analysis of journal February 2017
In vitro and in vivo characterization of three Cellvibrio japonicus glycoside hydrolase family 5 members reveals potent xyloglucan backbone-cleaving functions journal February 2018
The modular architecture of Cellvibrio japonicus mannanases in glycoside hydrolase families 5 and 26 points to differences in their role in mannan degradation journal May 2003
Understanding How the Complex Molecular Architecture of Mannan-degrading Hydrolases Contributes to Plant Cell Wall Degradation journal December 2013
Carbon catabolite repression in Pseudomonas : optimizing metabolic versatility and interactions with the environment journal September 2010
Proteomic researches for lignocellulose-degrading enzymes: A mini-review journal October 2018
Mannans: An overview of properties and application in food products journal November 2018
Production, properties, and applications of endo-β-mannanases journal January 2017
New insights into transport capability of sugars and its impact on growth from novel mutants of Escherichia coli journal January 2020
α-Galactosidase A fromPseudomonas fluorescenssubsp.cellulosa: cloning, high level expression and its role in galactomannan hydrolysis journal November 2000
Crystal Structure of Mannanase 26A from Pseudomonas cellulosa and Analysis of Residues Involved in Substrate Binding journal May 2001
Bioethanol production from waste lignocelluloses: A review on microbial degradation potential journal September 2019
Enzymatic Production and Characterization of Konjac Glucomannan Oligosaccharides journal November 2011
Alpha- and beta-mannan utilization by marine Bacteroidetes: Marine mannan utilization journal October 2018
Insights into SusCD-mediated glycan import by a prominent gut symbiont journal January 2021
Lignocellulose biodegradation: Fundamentals and applications journal June 2002
An overview of mannan structure and mannan-degrading enzyme systems journal April 2008
Development and evaluation of an agar capture system (ACS) for high-throughput screening of insoluble particulate substrates with bacterial growth and enzyme activity assays journal November 2021
Mannanase A from Pseudomonas fluorescens ssp. cellulosa Is a Retaining Glycosyl Hydrolase in Which E212 and E320 Are the Putative Catalytic Residues journal January 1996
Proteomic insights into mannan degradation and protein secretion by the forest floor bacterium Chitinophaga pinensis journal March 2017
Degradation of Konjac Glucomannan by Enzymes in Human Feces and Formation of Short-Chain Fatty Acids by Intestinal Anaerobic Bacteria. journal January 1998
The Biochemistry and Structural Biology of Plant Cell Wall Deconstruction journal April 2010
Cellulose and hemicellulose decomposition by forest soil bacteria proceeds by the action of structurally variable enzymatic systems journal April 2016
A review of the enzymatic hydrolysis of mannans and synergistic interactions between β-mannanase, β-mannosidase and α-galactosidase journal May 2015
Microbial Mannanases: An Overview of Production and Applications journal January 2007
Mannanases: microbial sources, production, properties and potential biotechnological applications journal February 2012
Consolidation of glycosyl hydrolase family 30: A dual domain 4/7 hydrolase family consisting of two structurally distinct groups journal October 2010
Galactomannan hydrolysis and mannose metabolism inCellvibrio mixtus journal August 2006
Cellulosomes: plant-cell-wall-degrading enzyme complexes journal July 2004
HTSeq--a Python framework to work with high-throughput sequencing data journal September 2014
Structure of a Mannan-specific Family 35 Carbohydrate-Binding Module: Evidence for Significant Conformational Changes upon Ligand Binding journal March 2005
The carbohydrate-active enzymes database (CAZy) in 2013 journal November 2013
Boosting of enzymatic softwood saccharification by fungal GH5 and GH26 endomannanases journal July 2018
The Cellvibrio japonicus Mannanase Cj Man26C Displays a Unique exo -Mode of Action That Is Conferred by Subtle Changes to the Distal Region of the Active Site journal September 2008
Phylogenetic Analysis of  -Galactosidases of the GH27 Family journal May 2004
Insights into Plant Cell Wall Degradation from the Genome Sequence of the Soil Bacterium Cellvibrio japonicus journal June 2008
New microbial mannan catabolic pathway that involves a novel mannosylglucose phosphorylase journal May 2011
Glycan utilisation system in Bacteroides and Bifidobacteria and their roles in gut stability and health journal July 2019
Mannan biotechnology: from biofuels to health journal July 2013
A pair of esterases from a commensal gut bacterium remove acetylations from all positions on complex β-mannans journal March 2020
Systems biology defines the biological significance of redox‐active proteins during cellulose degradation in an aerobic bacterium journal October 2014
The mannobiose-forming exo-mannanase involved in a new mannan catabolic pathway in Bacteroides fragilis journal November 2013
Requirement of the Type II Secretion System for Utilization of Cellulosic Substrates by Cellvibrio japonicus journal June 2010
Mixed carbon substrates: a necessary nuisance or a missed opportunity? journal April 2020
Evolution, substrate specificity and subfamily classification of glycoside hydrolase family 5 (GH5) journal January 2012
Replication of an origin-containing derivative of plasmid RK2 dependent on a plasmid function provided in trans journal April 1979
Human gut Bacteroidetes can utilize yeast mannan through a selfish mechanism journal January 2015
Hemicellulose from Plant Biomass in Medical and Pharmaceutical Application: A Critical Review journal July 2019
Reclassification of 'Pseudomonas fluorescens subsp. cellulosa' NCIMB 10462 (Ueda et al. 1952) as Cellvibrio japonicus sp. nov. and revival of Cellvibrio vulgaris sp. nov., nom. rev. and Cellvibrio fulvus sp. nov., nom. rev. journal March 2003
Depolymerized konjac glucomannan: preparation and application in health care journal July 2018
Profiling microbial lignocellulose degradation and utilization by emergent omics technologies journal July 2016
Small mobilizable multi-purpose cloning vectors derived from the Escherichia coli plasmids pK18 and pK19: selection of defined deletions in the chromosome of Corynebacterium glutamicum journal July 1994
Bacterial α-diglucoside metabolism: perspectives and potential for biotechnology and biomedicine journal May 2021
How the walls come crumbling down: recent structural biochemistry of plant polysaccharide degradation journal June 2008
HISAT: a fast spliced aligner with low memory requirements journal March 2015
Moderated estimation of fold change and dispersion for RNA-seq data with DESeq2 journal December 2014