| Prohormone convertase-I deficiency is the rarest form of monogenic obesity. The disorder is characterized by severe childhood obesity, hypoadrenalism, reactive hypoglycemia, and elevated circulating levels of certain prohormones. It has been described in two patients: a 43-year-old woman and a female infant. The disorder is caused by mutations in the gene encoding prohormone convertase-1 (PCSK1, 5q15-q21), an enzyme involved in the processing of POMC, and numerous prohormones including proinsulin. |
