1-109923397-A-G

Variant names:

• chr1-109923397-A-G
• rs752931255
• NM_000757.6:c.776A>G

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_000757.6(CSF1):​c.776A>G​(p.Gln259Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000217 in 1,613,798 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000021 (0 hom.)
• Consequence: CSF1 NM_000757.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.30
• Publications: 0 publications found

Genes affected

CSF1 (HGNC:2432): (colony stimulating factor 1) The protein encoded by this gene is a cytokine that controls the production, differentiation, and function of macrophages. The active form of the protein is found extracellularly as a disulfide-linked homodimer, and is thought to be produced by proteolytic cleavage of membrane-bound precursors. The encoded protein may be involved in development of the placenta. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2011]

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.16748726).
• BS2: High AC in GnomAdExome4 at 31 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSF1	NM_000757.6	c.776A>G	p.Gln259Arg	missense_variant	Exon 6 of 9	ENST00000329608.11	NP_000748.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSF1	ENST00000329608.11	c.776A>G	p.Gln259Arg	missense_variant	Exon 6 of 9	1	NM_000757.6	ENSP00000327513.6

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152168 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

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: 0.0000588

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000199 AC: 5 AN: 251028 AF XY: 0.0000147

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: 0.0000440

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000212 AC: 31 AN: 1461630 Hom.: 0 Cov.: 31 AF XY: 0.0000193 AC XY: 14 AN XY: 727092

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44702

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26116

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86222

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53360

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.0000270 AC: 30 AN: 1111908

Other (OTH) AF: 0.0000166 AC: 1 AN: 60382

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152168 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74320

African (AFR) AF: 0.00 AC: 0 AN: 41440

American (AMR) AF: 0.00 AC: 0 AN: 15284

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5174

South Asian (SAS) AF: 0.00 AC: 0 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000588 AC: 4 AN: 68024

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.0000581 Hom.: 0

Bravo AF: 0.0000416

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Aug 17, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.776A>G (p.Q259R) alteration is located in exon 1 (coding exon 1) of the CSF1 gene. This alteration results from a A to G substitution at nucleotide position 776, causing the glutamine (Q) at amino acid position 259 to be replaced by an arginine (R). 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	0.094
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.27	T;T;T;.
Eigen	Benign	0.13
Eigen_PC	Benign	0.10
FATHMM_MKL	Benign	0.53	D
LIST_S2	Benign	0.73	.;T;T;T
M_CAP	Benign	0.040	D
MetaRNN	Benign	0.17	T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.1	M;.;M;M
PhyloP100		1.3
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-1.5	N;N;N;N
REVEL	Benign	0.17
Sift	Uncertain	0.015	D;D;D;D
Sift4G	Benign	0.065	T;T;T;D
Polyphen		0.99	D;.;D;D
Vest4		0.24
MVP		0.59
MPC		0.40
ClinPred		0.50	T
GERP RS		3.3
Varity_R		0.084
gMVP		0.11
Mutation Taster		=94/6	polymorphism

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: rs752931255; hg19: chr1-110466019;