Skip to main content
Log in

Structural insight into the substrate specificity of PLP fold type IV transaminases

  • Mini-Review
  • Published:
Applied Microbiology and Biotechnology Aims and scope Submit manuscript

Abstract

Pyridoxal-5′-phosphate-dependent transaminases of fold type IV (class IV) are promising enzymes for (R)-selective amination of organic compounds. Transaminases of fold type IV exhibit either strict (R)-selectivity or (S)-selectivity that is implemented within geometrically similar active sites of different amino acid compositions. Based on substrate specificity, class IV comprises three large families of transaminases: (S)-selective branched-chain L-amino acid aminotransferases and (R)-selective D-amino acid aminotransferases and (R)-amine:pyruvate transaminases. In this review, we aim to analyze the substrate profiles and correlations between the substrate specificity and organization of the active site in transaminases from these structurally related families. New transaminases with an expanded substrate specificity are also discussed. An analysis of the structural features of substrate binding and comparisons of structural determinants of chiral discrimination between members of the class IV transaminases could be helpful in identifying new biocatalytically relevant enzymes as well as rational protein engineering.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Scheme 1
Scheme 2
Fig. 2
Fig. 3
Fig. 4
Fig. 5

Similar content being viewed by others

References

Download references

Funding

The analysis of the structural features of R-TAs and TAs with an expanded substrate specificity was supported by the Russian Science Foundation project № 19-14-00164. The analysis of  BCATs was supported by Ministry of Science and Higher Education of the Russian Federation.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Ekaterina Yu. Bezsudnova.

Ethics declarations

Conflict of interests

The authors declare that they have no conflict of interest.

Human and animal rights

This article does not contain any studies with human participants or animals performed by any of the authors.

Additional information

Publisher’s note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Electronic supplementary material

ESM 1

(DOCX 192 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Bezsudnova, E.Y., Popov, V.O. & Boyko, K.M. Structural insight into the substrate specificity of PLP fold type IV transaminases. Appl Microbiol Biotechnol 104, 2343–2357 (2020). https://doi.org/10.1007/s00253-020-10369-6

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00253-020-10369-6

Keywords

Navigation