The functions and inhibitors of protein tyrosine phosphatase B from Mycobacterium tuberculosis - Takeaways - MDSpire

The functions and inhibitors of protein tyrosine phosphatase B from Mycobacterium tuberculosis

  • By

  • Haonan Wang

  • Leiliang Zhang

  • June 4, 2026

  • 0 min

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  • 1

    Mycobacterium tuberculosis secretes PtpB, a protein tyrosine phosphatase that disrupts host innate immune defenses.

  • 2

    PtpB dephosphorylates components of the MAPK and JAK-STAT pathways, suppressing pro-inflammatory cytokine production.

  • 3

    Upon activation by host ubiquitin, PtpB inhibits pyroptosis by dephosphorylating plasma membrane lipids like PI4P and PI(4,5)P2.

  • 4

    PtpB is a promising target for novel anti-tuberculosis therapies, with potent inhibitors like Kuwanol E and OMTS identified.

  • 5

    Structural studies of PtpB reveal unique features that inform the design of selective inhibitors to combat tuberculosis.

Original Source(s)

The functions and inhibitors of protein tyrosine phosphatase B from Mycobacterium tuberculosis

  • by Haonan Wang, Leiliang Zhang

  • June 4, 2026

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