rs281860279

Variant names:

• chr5-150055267-A-G
• rs281860279
• NM_001288705.3:c.2624T>C

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2 PP3_Strong PP5_Moderate

The NM_001288705.3(CSF1R):​c.2624T>C​(p.Met875Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CSF1R NM_001288705.3 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 9.32

Genes affected

CSF1R (HGNC:2433): (colony stimulating factor 1 receptor) The protein encoded by this gene is the receptor for colony stimulating factor 1, a cytokine which controls the production, differentiation, and function of macrophages. This receptor mediates most if not all of the biological effects of this cytokine. Ligand binding activates the receptor kinase through a process of oligomerization and transphosphorylation. The encoded protein is a tyrosine kinase transmembrane receptor and member of the CSF1/PDGF receptor family of tyrosine-protein kinases. Mutations in this gene have been associated with a predisposition to myeloid malignancy. The first intron of this gene contains a transcriptionally inactive ribosomal protein L7 processed pseudogene oriented in the opposite direction. Alternative splicing results in multiple transcript variants. Expression of a splice variant from an LTR promoter has been found in Hodgkin lymphoma (HL), HL cell lines and anaplastic large cell lymphoma. [provided by RefSeq, Mar 2017]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.992
• PP5: Variant 5-150055267-A-G is Pathogenic according to our data. Variant chr5-150055267-A-G is described in ClinVar as [Pathogenic]. Clinvar id is 29810.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSF1R	NM_001288705.3	c.2624T>C	p.Met875Thr	missense_variant	Exon 19 of 21	ENST00000675795.1	NP_001275634.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSF1R	ENST00000675795.1	c.2624T>C	p.Met875Thr	missense_variant	Exon 19 of 21		NM_001288705.3	ENSP00000501699.1
CSF1R	ENST00000286301.7	c.2624T>C	p.Met875Thr	missense_variant	Exon 20 of 22	1		ENSP00000286301.3
CSF1R	ENST00000504875.5	n.*445T>C		non_coding_transcript_exon_variant	Exon 18 of 20	1		ENSP00000422212.1
CSF1R	ENST00000504875.5	n.*445T>C		3_prime_UTR_variant	Exon 18 of 20	1		ENSP00000422212.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary diffuse leukoencephalopathy with spheroids Pathogenic:1

Dec 25, 2011

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

not provided Pathogenic:1

Aug 12, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces methionine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 875 of the CSF1R protein (p.Met875Thr). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with clinical features of hereditary diffuse leukoencephalopathy with spheroids (PMID: 22197934; Invitae). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 29810). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on CSF1R protein function. Experimental studies have shown that this missense change affects CSF1R function (PMID: 22197934, 23408870, 24120500, 24145216, 24336230). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.31
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.74	D
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.70
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D
M_CAP	Pathogenic	0.68	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.39	D
MutationAssessor	Benign	1.2	L
PrimateAI	Uncertain	0.72	T
PROVEAN	Pathogenic	-4.8	D
REVEL	Pathogenic	0.92
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.98
MutPred		0.92		Gain of disorder (P = 0.1926);
MVP		0.93
MPC		0.38
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.98
gMVP		0.96

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

Publications

LitVar

Other links and lift over

dbSNP: rs281860279; hg19: chr5-149434830;