Neuropeptide K

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Neuropeptide K (also known as neurokinin K[1]), is a protein encoded by the TAC1 gene. It is an elongated derivative of the N-terminus of neurokinin A as the final post-translational processing product of beta-preprotachykinin.[2][3]

Like neurokinin A, neuropeptide K has been localized to sensory neurons and likely plays a role in regulating sensation.[3]

While several mammalian brains are shown to express substance P and neurokinin A, they differ on expression of neurokinin A-derived peptides. In contrast with rat and cow brains, the human brain contains larger amounts of neuropeptide K.[4]


  1. ^ Dornan WA, Vink KL, Malen P, Short K, Struthers W, Barrett C (August 1993). "Site-specific effects of intracerebral injections of three neurokinins (neurokinin A, neurokinin K, and neurokinin gamma) on the expression of male rat sexual behavior". Physiol. Behav. 54 (2): 249–58. doi:10.1016/0031-9384(93)90107-Q. PMID 7690487. 
  2. ^ Takeda, Y; Krause, JE (Jan 1989). "Neuropeptide K potently stimulates salivary gland secretion and potentiates substance P-induced salivation". Proc Natl Acad Sci U S A. 86 (1): 392–396. doi:10.1073/pnas.86.1.392. PMC 286471Freely accessible. PMID 2463627. 
  3. ^ a b Holzer, P. (1988-03-01). "Local effector functions of capsaicin-sensitive sensory nerve endings: Involvement of tachykinins, calcitonin gene-related peptide and other neuropeptides". Neuroscience. 24 (3): 739–768. doi:10.1016/0306-4522(88)90064-4. 
  4. ^ Bannon, Michael J.; Poosch, Michael S.; Haverstick, Doris M.; Anita, Mandal; Xue, Iris C. -H.; Shibata, Kazuhiko; Dragovic, Ljubisa J. (1992-01-01). "Preprotachykinin gene expression in the human basal ganglia: characterization of mRNAs and pre-mRNAs produced by alternate RNA splicing". Molecular Brain Research. 12 (1–3): 225–231. doi:10.1016/0169-328X(92)90088-S.