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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Hum+Genet
2013 ; 93
(6
): 1108-17
Nephropedia Template TP
gab.com Text
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English Wikipedia
Identification of KLHL41 Mutations Implicates BTB-Kelch-Mediated Ubiquitination
as an Alternate Pathway to Myofibrillar Disruption in Nemaline Myopathy
#MMPMID24268659
Gupta VA
; Ravenscroft G
; Shaheen R
; Todd EJ
; Swanson LC
; Shiina M
; Ogata K
; Hsu C
; Clarke NF
; Darras BT
; Farrar MA
; Hashem A
; Manton ND
; Muntoni F
; North KN
; Sandaradura SA
; Nishino I
; Hayashi YK
; Sewry CA
; Thompson EM
; Yau KS
; Brownstein CA
; Yu TW
; Allcock RJ
; Davis MR
; Wallgren-Pettersson C
; Matsumoto N
; Alkuraya FS
; Laing NG
; Beggs AH
Am J Hum Genet
2013[Dec]; 93
(6
): 1108-17
PMID24268659
show ga
Nemaline myopathy (NM) is a rare congenital muscle disorder primarily affecting
skeletal muscles that results in neonatal death in severe cases as a result of
associated respiratory insufficiency. NM is thought to be a disease of sarcomeric
thin filaments as six of eight known genes whose mutation can cause NM encode
components of that structure, however, recent discoveries of mutations in
non-thin filament genes has called this model in question. We performed
whole-exome sequencing and have identified recessive small deletions and missense
changes in the Kelch-like family member 41 gene (KLHL41) in four individuals from
unrelated NM families. Sanger sequencing of 116 unrelated individuals with NM
identified compound heterozygous changes in KLHL41 in a fifth family. Mutations
in KLHL41 showed a clear phenotype-genotype correlation: Frameshift mutations
resulted in severe phenotypes with neonatal death, whereas missense changes
resulted in impaired motor function with survival into late childhood and/or
early adulthood. Functional studies in zebrafish showed that loss of Klhl41
results in highly diminished motor function and myofibrillar disorganization,
with nemaline body formation, the pathological hallmark of NM. These studies
expand the genetic heterogeneity of NM and implicate a critical role of BTB-Kelch
family members in maintenance of sarcomeric integrity in NM.