Question

(4 Points) There is a relatively rare condition known as Persistent Hyperinsulinemic Hypoglycemia of Infancy (PHHI) resulting from a gain-of-function mutation in Kir6.2. Describe how such a mutation in Kir6.2 might contribute to the symptoms associated with PHHI. 2.
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Answer #1

In 1995 mutation in the sulfonylurea receptor gene in familial persistent hyperinsulinemic hypoglycemia of infancy. Paternal mutation of the sulfonylurea receptor(SUR1) gene and material loss of 11p15 imprinted gene lead to persistent hyperinsulinism in focal of gene.

mutation in Kir6.2

Kir6.2 is a major subunit of the ATP sensitive K+ channel. An inward rectifier potassium ion channel.The gene encoding the channel is called KCNJ11 and mutation in this gene are associated with congenital hyperinsulinisn.

KCNJ11 IDENTIFIERS

1.Aliases:KCNJ11,BIR,HHF2,POTASSIUM voltagge gate channel sub family

2.External ids:OMIM,600937MGI,

GENE LOCATION(human)

Chromosome 11in humans

Brand 11p15.1 and its start and end readings

Start:17385859bp

End:17389331

Gene location in mouse

Chromosome 7 in mouse

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