chr3-52818522-G-C

Variant names:

• chr3-52818522-G-C
• rs4687657
• NM_002218.5:c.2092C>G
• ITIH4 p.Pro698Ala

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002218.5(ITIH4):​c.2092C>G​(p.Pro698Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P698T) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: ITIH4 NM_002218.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.330
• Publications: 61 publications found

Genes affected

ITIH4 (HGNC:6169): (inter-alpha-trypsin inhibitor heavy chain 4) The protein encoded by this gene is secreted into the blood, where it is cleaved by plasma kallikrein into two smaller forms. Expression of this gene has been detected only in liver, and it seems to be upregulated during surgical trauma. This gene is part of a cluster of similar genes on chromosome 3. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2009]

ENSG00000243696 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11601269).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002218.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITIH4	NM_002218.5	MANE Select	c.2092C>G	p.Pro698Ala	missense	Exon 18 of 24	NP_002209.2
	ITIH4	NM_001166449.2		c.2002C>G	p.Pro668Ala	missense	Exon 16 of 22	NP_001159921.1	Q14624-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITIH4	ENST00000266041.9	TSL:1 MANE Select	c.2092C>G	p.Pro698Ala	missense	Exon 18 of 24	ENSP00000266041.4	Q14624-1
	ITIH4	ENST00000485816.5	TSL:1	c.2107C>G	p.Pro703Ala	missense	Exon 18 of 24	ENSP00000417824.1	B7ZKJ8
	ITIH4	ENST00000441637.2	TSL:1	c.1573C>G	p.Pro525Ala	missense	Exon 13 of 18	ENSP00000395634.2	H7C0L5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1450518 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 720482

African (AFR) AF: 0.00 AC: 0 AN: 33258

American (AMR) AF: 0.00 AC: 0 AN: 42840

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25956

East Asian (EAS) AF: 0.00 AC: 0 AN: 39196

South Asian (SAS) AF: 0.00 AC: 0 AN: 84448

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52690

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1106426

Other (OTH) AF: 0.00 AC: 0 AN: 59948

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.060
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.68
CADD	Benign	0.22
DANN	Benign	0.55
DEOGEN2	Uncertain	0.43	T
Eigen	Benign	-0.84
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.030	N
LIST_S2	Benign	0.43	T
M_CAP	Benign	0.0075	T
MetaRNN	Benign	0.12	T
MetaSVM	Benign	-0.89	T
MutationAssessor	Benign	1.2	L
PhyloP100		-0.33
PrimateAI	Benign	0.22	T
PROVEAN	Benign	-1.4	N
REVEL	Benign	0.14
Sift	Benign	0.16	T
Sift4G	Benign	0.26	T
Varity_R		0.056
gMVP		0.24
Mutation Taster		=97/3	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs4687657;

hg19: chr3-52852538;