Variations in the enzymatic activity of S1-type nucleases results from differences in their active site structures

Krela, Rafał; Poręba, Elżbieta; Leśniewicz, Krzysztof

doi:10.1016/j.bbagen.2023.130424

Biochimica et Biophysica Acta (BBA) - General Subjects

2023

DOI: 10.1016/j.bbagen.2023.130424

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Variations in the enzymatic activity of S1-type nucleases results from differences in their active site structures

Rafał Krela

Elżbieta Poręba

Krzysztof Leśniewicz

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2024

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Substrate preference, RNA binding and active site versatility of Stenotrophomonas maltophilia nuclease SmNuc1, explained by a structural study

Adámková,

Trundová,

Kovaľ

et al. 2024

The FEBS Journal

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Nucleases of the S1/P1 family have important applications in biotechnology and molecular biology. We have performed structural analyses of SmNuc1 nuclease from Stenotrophomonas maltophilia, including RNA cleavage product binding and mutagenesis in a newly discovered flexible Arg74‐motif, involved in substrate binding and product release and likely contributing to the high catalytic rate. The Arg74Gln mutation shifts substrate preference towards RNA. Purine nucleotide binding differs compared to pyrimidines, confirming the plasticity of the active site. The enzyme–product interactions indicate a gradual, stepwise product release. The activity of SmNuc1 towards c‐di‐GMP in crystal resulted in a distinguished complex with the emerging product 5′‐GMP. This enzyme from an opportunistic pathogen relies on specific architecture enabling high performance under broad conditions, attractive for biotechnologies.

show abstract

Substrate preference, RNA binding and active site versatility of Stenotrophomonas maltophilia nuclease SmNuc1, explained by a structural study

Adámková,

Trundová,

Kovaľ

et al. 2024

The FEBS Journal

View full text Add to dashboard Cite

show abstract

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Variations in the enzymatic activity of S1-type nucleases results from differences in their active site structures

Cited by 1 publication

References 29 publications

Substrate preference, RNA binding and active site versatility of Stenotrophomonas maltophilia nuclease SmNuc1, explained by a structural study

Substrate preference, RNA binding and active site versatility of Stenotrophomonas maltophilia nuclease SmNuc1, explained by a structural study

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