10-79611899-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005411.5(SFTPA1):c.74T>A(p.Val25Asp) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: SFTPA1 NM_005411.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.269

Genes affected

SFTPA1 (HGNC:10798): (surfactant protein A1) This gene encodes a lung surfactant protein that is a member of a subfamily of C-type lectins called collectins. The encoded protein binds specific carbohydrate moieties found on lipids and on the surface of microorganisms. This protein plays an essential role in surfactant homeostasis and in the defense against respiratory pathogens. Mutations in this gene are associated with idiopathic pulmonary fibrosis. Alternate splicing results in multiple transcript variants. [provided by RefSeq, May 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.24168453).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SFTPA1	NM_005411.5	c.74T>A	p.Val25Asp	missense_variant	3/6	ENST00000398636.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SFTPA1	ENST00000398636.8	c.74T>A	p.Val25Asp	missense_variant	3/6	1	NM_005411.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 101

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 22, 2023

The c.74T>A (p.V25D) alteration is located in exon 3 (coding exon 1) of the SFTPA1 gene. This alteration results from a T to A substitution at nucleotide position 74, causing the valine (V) at amino acid position 25 to be replaced by an aspartic acid (D). 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	0.11
BayesDel_addAF	Benign	-0.025	T
BayesDel_noAF	Benign	-0.27
Cadd	Benign	13
Dann	Benign	0.94
DEOGEN2	Benign	0.089	T;T;.;.;.
Eigen	Benign	-0.61
Eigen_PC	Benign	-0.71
FATHMM_MKL	Benign	0.018	N
M_CAP	Benign	0.0032	T
MetaRNN	Benign	0.24	T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.9	L;L;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	-0.67	N;N;N;N;N
REVEL	Benign	0.24
Sift	Benign	0.065	T;T;D;D;D
Sift4G	Benign	0.20	T;T;T;T;T
Polyphen		0.31	B;B;.;.;.
Vest4		0.47
MutPred		0.71		Loss of sheet (P = 0.0025);Loss of sheet (P = 0.0025);.;Loss of sheet (P = 0.0025);Loss of sheet (P = 0.0025);
MVP		0.14
MPC		0.051
ClinPred		0.21	T
GERP RS		2.6
Varity_R		0.21
gMVP		0.30

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr10-81371655;