Details Of Published TSH Receptor Mutation

Ser 425 Ile

c.1274G>T

Constitutively Activating TSH Receptor Mutation

Type
gain
Manifestation
somatic
Exon
10
Molecular Characteristics:
default 
Clinical Features:
based on 7 hot nodules investigated by Trülzsch et al. 2001, Stephenson et al 2020 and Paloz-Paz et al. 
Treatment:
default
Functional Characteristics:
cAMP
(basal)
cAMP
(TSH)
IP
(basal)
IP
(TSH)
TSH-Binding
Cell Surface Expression
Prevalence
LRA
Ref
8.3
0.8
nd
nd
nd
0.76
7
n.d.
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:
Trülzsch et al.
J. Mol. Med. 78: 684-691
Detection of thyroid-stimulating hormone receptor and Gsalpha mutations: in 75 toxic thyroid nodules by denaturing gradient gel electrophoresis.
2001
Reference 2:
Palos-Paz et al.
Eur J Endocrinol. 159: 623-31
Prevalence of mutations in TSHR, GNAS, PRKAR1A and RAS genes in a large series of toxic thyroid adenomas from Galicia, an iodine-deficient area in NW Spain.
2008
Reference 3:
Stephenson et al.
Thyroid
Sensitive Sequencing Analysis Suggests Thyrotropin Receptor and Guanine Nucleotide-Binding Protein G Subunit Alpha as Sole Driver Mutations in Hot Thyroid Nodules
2020