16-1790710-C-G

Variant names:

• chr16-1790710-C-G
• rs143070371
• NM_004970.3:c.1708G>C

Variant summary

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

The NM_004970.3(IGFALS):​c.1708G>C​(p.Asp570His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,456,324 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D570N) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: IGFALS NM_004970.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.42
• Publications: 4 publications found

Genes affected

IGFALS (HGNC:5468): (insulin like growth factor binding protein acid labile subunit) The protein encoded by this gene is a serum protein that binds insulin-like growth factors, increasing their half-life and their vascular localization. Production of the encoded protein, which contains twenty leucine-rich repeats, is stimulated by growth hormone. Defects in this gene are a cause of acid-labile subunit deficiency, which maifests itself in a delayed and slow puberty. Three transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

SPSB3 (HGNC:30629): (splA/ryanodine receptor domain and SOCS box containing 3) Predicted to be involved in proteasome-mediated ubiquitin-dependent protein catabolic process. Predicted to be located in cytosol. Predicted to be part of SCF ubiquitin ligase complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004970.3. 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
	IGFALS	NM_004970.3	MANE Select	c.1708G>C	p.Asp570His	missense	Exon 2 of 2	NP_004961.1	P35858-1
	IGFALS	NM_001146006.2		c.1822G>C	p.Asp608His	missense	Exon 2 of 2	NP_001139478.1	P35858-2
	IGFALS	NR_027389.1		n.1762G>C		non_coding_transcript_exon	Exon 2 of 2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IGFALS	ENST00000215539.4	TSL:1 MANE Select	c.1708G>C	p.Asp570His	missense	Exon 2 of 2	ENSP00000215539.3	P35858-1
	IGFALS	ENST00000415638.3	TSL:2	c.1822G>C	p.Asp608His	missense	Exon 2 of 2	ENSP00000416683.3	P35858-2
	IGFALS	ENST00000897144.1		c.1783G>C	p.Asp595His	missense	Exon 3 of 3	ENSP00000567203.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.00000840 AC: 2 AN: 237990 AF XY: 0.00000771

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1456324 Hom.: 0 Cov.: 30 AF XY: 0.00000276 AC XY: 2 AN XY: 724146

African (AFR) AF: 0.00 AC: 0 AN: 33414

American (AMR) AF: 0.00 AC: 0 AN: 44088

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25992

East Asian (EAS) AF: 0.00 AC: 0 AN: 39500

South Asian (SAS) AF: 0.0000352 AC: 3 AN: 85344

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51798

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1110256

Other (OTH) AF: 0.00 AC: 0 AN: 60172

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.094	T
BayesDel_noAF	Benign	-0.19
CADD	Uncertain	24
DANN	Uncertain	0.99
DEOGEN2	Benign	0.28	T
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.69	T
M_CAP	Uncertain	0.29	D
MetaRNN	Uncertain	0.60	D
MetaSVM	Benign	-0.34	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		7.4
PrimateAI	Benign	0.44	T
PROVEAN	Uncertain	-2.5	N
REVEL	Benign	0.22
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0040	D
Polyphen		1.0	D
Vest4		0.53
MutPred		0.37		Gain of catalytic residue at D570 (P = 0.0608)
MVP		0.92
MPC		0.33
ClinPred		0.97	D
GERP RS		4.2
Varity_R		0.43
gMVP		0.62

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

Other links and lift over

dbSNP: rs143070371; hg19: chr16-1840711;