Production and characterization of reduced NAADP (nicotinic acid-adenine dinucleotide phosphate)

RA Billington, JW Thuring, Stuart John Conway, L Packman, AB Holmes, AA Genazzani

Research output: Contribution to journalArticlepeer-review

Abstract

The pyridine nucleotide NAADP (nicotinic acid-adenine dinucleotide phosphate) has been shown to act as a Ca-2divided by-releasing intracellular messenger in a wide variety of systems from invertebrates to mammals and has been implicated in a number of cellular processes. NAADP is structurally very similar to its precursor. the endogenous coenzyme NADP and while much is known about the reduced form of NADP, NADPH, it is not known whether NAADP can also exist in a reduced state. Here we report that NAADP can be reduced to NAADPH by endogenous cellular enzymes and that NAADPH is functionally inert at the NAADP receptor. These data suggest that NAADPH could represent a mechanism for rapidly inactivating NAADP in cells.

Original languageEnglish
Pages (from-to)275-280
Number of pages6
JournalBiochemical Journal
Volume378
Publication statusPublished - 15 Feb 2004

Keywords

  • calcium signalling
  • dehydrogenase
  • fertilization
  • reduced nicotinic acid-adenine dinucleotide phosphate (reduced NAADP)
  • nicotinic acid-adenine dinucleotide phosphate
  • (NAADP)
  • sea urchin
  • CYCLIC ADP-RIBOSE
  • SEA-URCHIN EGGS
  • INOSITOL TRISPHOSPHATE
  • CA2+ RELEASE
  • MOBILIZES CA2+
  • FERTILIZATION
  • MESSENGER
  • ROLES
  • INACTIVATION
  • COORDINATION

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