Catalyzes the transfer of endogenously produced octanoic acid from octanoyl-acyl-carrier-protein onto the lipoyl domains of lipoate-dependent enzymes. Lipoyl-ACP can also act as a substrate although octanoyl-ACP is likely to be the physiological substrate (By similarity).
Habarou, Hamel, Haack, Feichtinger, Lebigot, Marquardt, Busiah, Laroche, Madrange, Grisel, Pontoizeau, Eisermann, Boutron, Chrétien, Chadefaux-Vekemans, Barouki, Bole-Feysot, Nitschke, Goudin et al.: "Biallelic Mutations in LIPT2 Cause a Mitochondrial Lipoylation Defect Associated with Severe Neonatal Encephalopathy. ..." in: American journal of human genetics, Vol. 101, Issue 2, pp. 283-290, (2017) (PubMed).