Identification of tick periviscerokinin, the first neurohormone of Ixodidae: single cell analysis by means of MALDI-TOF/TOF mass spectrometry.

Abstract:

:The first peptidergic neurohormone from the ticks Ixodes ricinus and Boophilus microplus has been identified by using a combination of immunocytochemistry and mass spectrometric analysis of single cells. The novel peptide (Ixori-PVK, PALIPFPRV-NH2) shows a high sequence homology with members of the insect periviscerokinin/CAP2b peptides that in insects are involved in the regulation of water balance. The function of this peptide in ticks is still unknown, but these pests consume large amounts of blood in a single blood meal which is a challenge for the regulation of diuretic processes. Thus, the novel peptide may be involved in one of the key physiological processes in ticks. High energy collision-induced dissociation was successfully used to distinguish between Leu/Ile ambiguities in single cell preparations. This is the first successful de novo sequencing of a peptide from single cell preparations of arthropods.

authors

Neupert S,Predel R,Russell WK,Davies R,Pietrantonio PV,Nachman RJ

doi

10.1016/j.bbrc.2005.10.165

subject

Has Abstract

pub_date

2005-12-30 00:00:00

pages

1860-4

issue

4

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)02449-6

journal_volume

338

pub_type

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