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2015 ; 2
(ä): 81-84
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English Wikipedia
First contiguous gene deletion causing biotinidase deficiency: The enzyme
deficiency in three Sri Lankan children
#MMPMID28649532
Senanayake DN
; Jasinge EA
; Pindolia K
; Wanigasinghe J
; Monaghan K
; Suchy SF
; Wei S
; Jaysena S
; Wolf B
Mol Genet Metab Rep
2015[Mar]; 2
(ä): 81-84
PMID28649532
show ga
We report three symptomatic children with profound biotinidase deficiency from
Sri Lanka. All three children presented with typical clinical features of the
disorder. The first is homozygous for a missense mutation in the BTD gene
(c.98_104 del7insTCC; p.Cys33PhefsX36) that is commonly seen in the western
countries, the second is homozygous for a novel missense mutation (p.Ala439Asp),
and the third is the first reported instance of a contiguous gene deletion
causing the enzyme deficiency. In addition, this latter finding exemplifies the
importance of considering a deletion within the BTD gene for reconciling
enzymatic activity with genotype, which can occur in asymptomatic children who
are identified by newborn screening.