NAD(P) transhydrogenase has vital non-mitochondrial functions in malaria parasite transmission.

Abstract:

:Nicotinamide adenine dinucleotide (NAD) and its phosphorylated form (NADP) are vital for cell function in all organisms and form cofactors to a host of enzymes in catabolic and anabolic processes. NAD(P) transhydrogenases (NTHs) catalyse hydride ion transfer between NAD(H) and NADP(H). Membrane-bound NTH isoforms reside in the cytoplasmic membrane of bacteria, and the inner membrane of mitochondria in metazoans, where they generate NADPH. Here, we show that malaria parasites encode a single membrane-bound NTH that localises to the crystalloid, an organelle required for sporozoite transmission from mosquitos to vertebrates. We demonstrate that NTH has an essential structural role in crystalloid biogenesis, whilst its enzymatic activity is required for sporozoite development. This pinpoints an essential function in sporogony to the activity of a single crystalloid protein. Its additional presence in the apicoplast of sporozoites identifies NTH as a likely supplier of NADPH for this organelle during liver infection. Our findings reveal that Plasmodium species have co-opted NTH to a variety of non-mitochondrial organelles to provide a critical source of NADPH reducing power.

journal_name

EMBO Rep

journal_title

EMBO reports

authors

Saeed S,Tremp AZ,Sharma V,Lasonder E,Dessens JT

doi

10.15252/embr.201947832

subject

Has Abstract

pub_date

2020-03-04 00:00:00

pages

e47832

issue

3

eissn

1469-221X

issn

1469-3178

journal_volume

21

pub_type

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