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2014 ; 124
(18
): 2867-71
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Mutations in TRNT1 cause congenital sideroblastic anemia with immunodeficiency,
fevers, and developmental delay (SIFD)
#MMPMID25193871
Chakraborty PK
; Schmitz-Abe K
; Kennedy EK
; Mamady H
; Naas T
; Durie D
; Campagna DR
; Lau A
; Sendamarai AK
; Wiseman DH
; May A
; Jolles S
; Connor P
; Powell C
; Heeney MM
; Giardina PJ
; Klaassen RJ
; Kannengiesser C
; Thuret I
; Thompson AA
; Marques L
; Hughes S
; Bonney DK
; Bottomley SS
; Wynn RF
; Laxer RM
; Minniti CP
; Moppett J
; Bordon V
; Geraghty M
; Joyce PB
; Markianos K
; Rudner AD
; Holcik M
; Fleming MD
Blood
2014[Oct]; 124
(18
): 2867-71
PMID25193871
show ga
Mutations in genes encoding proteins that are involved in mitochondrial heme
synthesis, iron-sulfur cluster biogenesis, and mitochondrial protein synthesis
have previously been implicated in the pathogenesis of the congenital
sideroblastic anemias (CSAs). We recently described a syndromic form of CSA
associated with B-cell immunodeficiency, periodic fevers, and developmental delay
(SIFD). Here we demonstrate that SIFD is caused by biallelic mutations in TRNT1,
the gene encoding the CCA-adding enzyme essential for maturation of both nuclear
and mitochondrial transfer RNAs. Using budding yeast lacking the TRNT1 homolog,
CCA1, we confirm that the patient-associated TRNT1 mutations result in partial
loss of function of TRNT1 and lead to metabolic defects in both the mitochondria
and cytosol, which can account for the phenotypic pleiotropy.