1-154272734-T-C

Position:

• chr1-154272734-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_006118.4(HAX1):​c.11T>C​(p.Phe4Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000404 in 1,461,852 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. F4F) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000040 (0 hom.)
• Consequence: HAX1 NM_006118.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:5
• Conservation: PhyloP100: 2.63

Genes affected

HAX1 (HGNC:16915): (HCLS1 associated protein X-1) The protein encoded by this gene is known to associate with hematopoietic cell-specific Lyn substrate 1, a substrate of Src family tyrosine kinases. It also interacts with the product of the polycystic kidney disease 2 gene, mutations in which are associated with autosomal-dominant polycystic kidney disease, and with the F-actin-binding protein, cortactin. It was earlier thought that this gene product is mainly localized in the mitochondria, however, recent studies indicate it to be localized in the cell body. Mutations in this gene result in autosomal recessive severe congenital neutropenia, also known as Kostmann disease. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

HAX1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.41734973).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HAX1	NM_006118.4	c.11T>C	p.Phe4Ser	missense_variant	1/7	ENST00000328703.12	NP_006109.2
HAX1	NM_001018837.2	c.11T>C	p.Phe4Ser	missense_variant	1/7		NP_001018238.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HAX1	ENST00000328703.12	c.11T>C	p.Phe4Ser	missense_variant	1/7	1	NM_006118.4	ENSP00000329002.7

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000159 AC: 4 AN: 251130 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135690

Gnomad AFR exome AF: 0.0000617

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000327

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000404 AC: 59 AN: 1461852 Hom.: 0 Cov.: 31 AF XY: 0.0000399 AC XY: 29 AN XY: 727214

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000522

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000330 AC: 4

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Kostmann syndrome Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jul 19, 2018	This sequence change replaces phenylalanine with serine at codon 4 of the HAX1 protein (p.Phe4Ser). The phenylalanine residue is moderately conserved and there is a large physicochemical difference between phenylalanine and serine. This variant is present in population databases (rs780614125, ExAC 0.01%). This variant has not been reported in the literature in individuals with HAX1-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Feb 12, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Apr 14, 2022	- -

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 26, 2024

The p.F4S variant (also known as c.11T>C), located in coding exon 1 of the HAX1 gene, results from a T to C substitution at nucleotide position 11. The phenylalanine at codon 4 is replaced by serine, an amino acid with highly dissimilar properties. This amino acid position is conserved. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Mayo Clinic Laboratories, Mayo Clinic

Jun 17, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.41
BayesDel_addAF	Uncertain	0.056	T
BayesDel_noAF	Uncertain	0.030
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.74	D;.;.;.
Eigen	Uncertain	0.56
Eigen_PC	Uncertain	0.51
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.60	T;T;T;T
M_CAP	Uncertain	0.11	D
MetaRNN	Benign	0.42	T;T;T;T
MetaSVM	Uncertain	-0.085	T
MutationAssessor	Uncertain	2.2	M;M;M;.
PrimateAI	Uncertain	0.68	T
PROVEAN	Pathogenic	-4.7	D;D;D;D
REVEL	Benign	0.23
Sift	Uncertain	0.0010	D;D;D;D
Sift4G	Uncertain	0.0080	D;D;D;D
Polyphen		1.0	D;P;D;.
Vest4		0.59
MutPred		0.27		Loss of stability (P = 0.0211);Loss of stability (P = 0.0211);Loss of stability (P = 0.0211);Loss of stability (P = 0.0211);
MVP		0.97
MPC		0.50
ClinPred		0.97	D
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.79
gMVP		0.29

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs780614125; hg19: chr1-154245210;