Understanding molecular recognition of promiscuity of thermophilic methionine adenosyltransferase sMAT from Sulfolobus solfataricus

Methionine adenosyltransferase (MAT) is a family of enzymes that utilizes ATP and methionine to produce S‐adenosylmethionine (AdoMet), the most crucial methyl donor in the biological methylation of biomolecules and bioactive natural products. Here, we report that the MAT from Sulfolobus solfataricus...

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Bibliographic Details
Published in:The FEBS journal 2014-09, Vol.281 (18), p.4224-4239
Main Authors: Wang, Fengbin, Singh, Shanteri, Zhang, Jianjun, Huber, Tyler D, Helmich, Kate E, Sunkara, Manjula, Hurley, Katherine A, Goff, Randal D, Bingman, Craig A, Morris, Andrew J, Thorson, Jon S, Phillips, George N., Jr
Format: Article
Language:English
Subjects:
active sites
adenosine triphosphate
Amino Acid Motifs
Archaea
Archaeal Proteins - chemistry
bioactive properties
Catalysis
Catalytic Domain
Crystal structure
Crystallography, X-Ray
enzyme engineering
Enzymes
Escherichia coli
humans
Kinetics
Methionine - chemistry
methionine adenosyltransferase
Methionine Adenosyltransferase - chemistry
methylation
Models, Molecular
Molecular biology
natural product
Protein Binding
Protein Structure, Quaternary
S-adenosylmethionine
Substrate Specificity
Sulfolobus solfataricus
Sulfolobus solfataricus - enzymology
thermal stability
X-ray diffraction
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Summary:Methionine adenosyltransferase (MAT) is a family of enzymes that utilizes ATP and methionine to produce S‐adenosylmethionine (AdoMet), the most crucial methyl donor in the biological methylation of biomolecules and bioactive natural products. Here, we report that the MAT from Sulfolobus solfataricus (sMAT), an enzyme from a poorly explored class of the MAT family, has the ability to produce a range of differentially alkylated AdoMet analogs in the presence of non‐native methionine analogs and ATP. To investigate the molecular basis for AdoMet analog production, we have crystallized the sMAT in the AdoMet bound, S‐adenosylethionine (AdoEth) bound and unbound forms. Notably, among these structures, the AdoEth bound form offers the first MAT structure containing a non‐native product, and cumulatively these structures add new structural insight into the MAT family and allow for detailed active site comparison with its homologs in Escherichia coli and human. As a thermostable MAT structure from archaea, the structures herein also provide a basis for future engineering to potentially broaden AdoMet analog production as reagents for methyltransferase‐catalyzed ‘alkylrandomization’ and/or the study of methylation in the context of biological processes. DATABASES: PDB IDs: 4HPV, 4L7I, 4K0B and 4L2Z. EC 2.5.1.6 STRUCTURED DIGITAL ABSTRACT: • sMAT and sMAT bind by x-ray crystallography (View interaction)
ISSN:1742-464X
1742-4658
DOI:10.1111/febs.12784