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User:Zachary Armstrong

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Dr. Zachary Armstrong, a native of Iqaluit, Nunavut, obtained his B.Sc. — majoring in chemistry and biochemistry — from the University of British Columbia. His final year project, performed under the guidance of Professor Steve Withers, focused on the creation of a GH11 thioglycoligase [1]. He completed his PhD at the University of British Columbia, co-supervised by Professors Steve Withers and Steven J. Hallam. This work focused on the identification of glycoside hydrolases from metagenomic sources — including the beaver gut[2],a mining bioreactor[3] and soils[4]— and the engineering of glycosynthases from metagenomes and synthetic gene libraries[5]. In 2018 he joined the group of Gideon Davies in the York Structural Biology Laboratories at the University of York as a postdoctoral research associate. His current work focuses on mechanism-based inhibitors and activity-based protein profiling of human carbohydrate processing enzymes.

He has determined the crystal structure of :

  • GH164 Bacteroides salyersiae beta-mannosidase [6]



  1. Armstrong Z, Reitinger S, Kantner T, and Withers SG. (2010) Enzymatic thioxyloside synthesis: characterization of thioglycoligase variants identified from a site-saturation mutagenesis library of Bacillus circulans xylanase. Chembiochem. 11, 533-8. DOI:10.1002/cbic.200900711 | PubMed ID:20112321 | HubMed [Armstrong2010]
  2. Armstrong Z, Mewis K, Liu F, Morgan-Lang C, Scofield M, Durno E, Chen HM, Mehr K, Withers SG, and Hallam SJ. (2018) Metagenomics reveals functional synergy and novel polysaccharide utilization loci in the Castor canadensis fecal microbiome. ISME J. 12, 2757-2769. DOI:10.1038/s41396-018-0215-9 | PubMed ID:30013164 | HubMed [Armstrong2018]
  3. Mewis K, Armstrong Z, Song YC, Baldwin SA, Withers SG, and Hallam SJ. (2013) Biomining active cellulases from a mining bioremediation system. J Biotechnol. 167, 462-71. DOI:10.1016/j.jbiotec.2013.07.015 | PubMed ID:23906845 | HubMed [Armstrong2013]
  4. Armstrong Z, Liu F, Kheirandish S, Chen HM, Mewis K, Duo T, Morgan-Lang C, Hallam SJ, and Withers SG. (2019) High-Throughput Recovery and Characterization of Metagenome-Derived Glycoside Hydrolase-Containing Clones as a Resource for Biocatalyst Development. mSystems. 4. DOI:10.1128/mSystems.00082-19 | PubMed ID:31164449 | HubMed [Armstrong2019mSys]
  5. Armstrong Z, Liu F, Chen H-M, Hallam SJ, Withers SG. (2019) Systematic Screening of Synthetic Gene-Encoded Enzymes for Synthesis of Modified Glycosides. ACS Catal. 53, 689-98. | DOI: 10.1021/acscatal.8b05179
    [Armstrong2019Acs]
  6. Armstrong Z and Davies GJ. (2020) Structure and function of Bs164 β-mannosidase from Bacteroides salyersiae the founding member of glycoside hydrolase family GH164. J Biol Chem. 295, 4316-4326. DOI:10.1074/jbc.RA119.011591 | PubMed ID:31871050 | HubMed [Armstrong2019JBC]
All Medline abstracts: PubMed | HubMed