Adenylate kinase phosphate energy shuttle underlies energetic communication in flagellar axonemes.
AK8
AK9
Subgroup III AKs
TP transfer
adenylate kinase
male infertility
radial spoke
Journal
Science China. Life sciences
ISSN: 1869-1889
Titre abrégé: Sci China Life Sci
Pays: China
ID NLM: 101529880
Informations de publication
Date de publication:
16 May 2024
16 May 2024
Historique:
received:
21
11
2023
accepted:
29
01
2024
medline:
18
5
2024
pubmed:
18
5
2024
entrez:
18
5
2024
Statut:
aheadofprint
Résumé
The complexities of energy transfer mechanisms in the flagella of mammalian sperm flagella have been intensively investigated and demonstrate significant diversity across species. Enzymatic shuttles, particularly adenylate kinase (AK) and creatine kinase (CK), are pivotal in the efficient transfer of intracellular ATP, showing distinct tissue- and species-specificity. Here, the expression profiles of AK and CK were investigated in mice and found to fall into four subgroups, of which Subgroup III AKs were observed to be unique to the male reproductive system and conserved across chordates. Both AK8 and AK9 were found to be indispensable to male reproduction after analysis of an infertile male cohort. Knockout mouse models showed that AK8 and AK9 were central to promoting sperm motility. Immunoprecipitation combined with mass spectrometry revealed that AK8 and AK9 interact with the radial spoke (RS) of the axoneme. Examination of various human and mouse sperm samples with substructural damage, including the presence of multiple RS subunits, showed that the head of radial spoke 3 acts as an adapter for AK9 in the flagellar axoneme. Using an ATP probe together with metabolomic analysis, it was found that AK8 and AK9 cooperatively regulated ATP transfer in the axoneme, and were concentrated at sites associated with energy consumption in the flagellum. These findings indicate a novel function for RS beyond its structural role, namely, the regulation of ATP transfer. In conclusion, the results expand the functional spectrum of AK proteins and suggest a fresh model regarding ATP transfer within mammalian flagella.
Identifiants
pubmed: 38761355
doi: 10.1007/s11427-023-2539-1
pii: 10.1007/s11427-023-2539-1
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2024. Science China Press.
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