3-52778944-C-T

Position:

chr3-52778944-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_002215.4(ITIH1):c.308C>T(p.Thr103Ile) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000172 in 1,609,996 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00016 ( 0 hom. )

Consequence

ITIH1
NM_002215.4 missense, splice_region

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.526

Variant links:

Genes affected

ITIH1 (HGNC:6166): (inter-alpha-trypsin inhibitor heavy chain 1) This gene encodes a member of the inter-alpha-trypsin inhibitor family of proteins. Alternative splicing results in multiple transcript variants, at least one of which encodes a preproprotein that is proteolytically processed to generate the heavy chain of the inter-alpha-trypsin inhibitor complex, which is secreted by hepatocytes into the blood. The heavy chain also interacts with hyaluronan, and this interaction may play a role in ovulation and fertilization, and has been implicated in multiple inflammatory diseases. This gene is present in a gene cluster on chromosome 3. [provided by RefSeq, Nov 2015]

ITIH1 links:

ITIH1 (HGNC:):

ITIH1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.014559478).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ITIH1	NM_002215.4 linkuse as main transcript	c.308C>T	p.Thr103Ile	missense_variant, splice_region_variant	4/22	ENST00000273283.7	NP_002206.2	P19827-1
ITIH1	NM_001166434.3 linkuse as main transcript	c.-119C>T		splice_region_variant	2/20		NP_001159906.1	P19827-2
ITIH1	NM_001166434.3 linkuse as main transcript	c.-119C>T		5_prime_UTR_variant	2/20		NP_001159906.1	P19827-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
ITIH1	ENST00000273283.7 linkuse as main transcript	c.308C>T	p.Thr103Ile	missense_variant, splice_region_variant	4/22	1	NM_002215.4	ENSP00000273283.2	P19827-1
ITIH1	ENST00000480409.1 linkuse as main transcript	n.308C>T		splice_region_variant, non_coding_transcript_exon_variant	4/6	5		ENSP00000417340.1	F8WAS2
ITIH1	ENST00000628722.2 linkuse as main transcript	n.163C>T		splice_region_variant, non_coding_transcript_exon_variant	2/20	2

Frequencies

GnomAD3 genomes

AF:

0.000256

AC:

AN:

152206

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.0318

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000835

AC:

AN:

251420

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

135878

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000149

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000163

AC:

238

AN:

1457790

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

725516

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000151

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000198

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.000256

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000132

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000133

Hom.:

Bravo

AF:

0.000291

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000115

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Aug 22, 2023

The c.308C>T (p.T103I) alteration is located in exon 4 (coding exon 4) of the ITIH1 gene. This alteration results from a C to T substitution at nucleotide position 308, causing the threonine (T) at amino acid position 103 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.25

BayesDel_noAF

Benign

-0.35

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.080

Eigen

Benign

0.065

Eigen_PC

Benign

-0.066

FATHMM_MKL

Benign

0.46

LIST_S2

Benign

0.76

M_CAP

Benign

0.010

MetaRNN

Benign

0.015

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.6

PrimateAI

Uncertain

0.52

PROVEAN

Uncertain

-3.5

REVEL

Benign

0.24

Sift

Benign

0.39

Sift4G

Benign

0.31

Polyphen

1.0

Vest4

0.36

MVP

0.60

MPC

0.69

ClinPred

0.21

GERP RS

4.5

Varity_R

0.29

gMVP

0.16

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over