Details Of Published TSH Receptor Mutation

Trp 488 Arg

c.1462T>A

Inactivating TSH Receptor Mutation

Type
loss
Manifestation
sporadic
Exon
10
Molecular Characteristics:
W488R/WT 
Clinical Features:
Vigone et al. single child, no parental or sibling data thus sporadic assumed, subclinical hypothyroidism 
Treatment:
Functional Characteristics:
cAMP
(basal)
cAMP
(TSH)
IP
(basal)
IP
(TSH)
TSH-Binding
Cell Surface Expression
Prevalence
LRA
Ref
1
Legend:
cAMP (basal): basal in vitro cAMP production of mutant over wild-type TSHR
cAMP (TSH): maximal in vitro cAMP production of mutant over wild-type TSHR
IP (basal): basal in vitro IP production of mutant over wild-type TSHR
IP (TSH): maximal in vitro IP production of mutant over wild-type TSHR
TSH-binding: maximal TSH-binding compared to the wild-type TSHR
Cell surface expression: cell surface expression of mutant compared to WT-TSHR
LRA: linear regression analysis (LRA) of constitutive activity as a function of TSHR expression determined by 125I-bTSH binding or FACS analysis compared to the wild-type TSHR
Prevalence: Prevalence of (somatic and germline) activating mutations*
Ref: Reference for functional characterization
Child: Found in children.
Reference 1:
Vigone et al.
Clinical Endocrinology
Mild TSH resistance: Clinical and hormonal features in childhood and adulthood
2017