chr5-150055259-G-T

Position:

• chr5-150055259-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PS1_Moderate PM2 PP3_Strong

The NM_001288705.3(CSF1R):​c.2632C>A​(p.Pro878Thr) 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 Uncertain significance (★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely pathogenicin UniProt.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CSF1R NM_001288705.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0

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]

CSF1R (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PS1: Transcript NM_001288705.3 (CSF1R) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in UniProt
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CSF1R	NM_001288705.3	c.2632C>A	p.Pro878Thr	missense_variant	19/21	ENST00000675795.1	NP_001275634.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CSF1R	ENST00000675795.1	c.2632C>A	p.Pro878Thr	missense_variant	19/21		NM_001288705.3	ENSP00000501699.1
CSF1R	ENST00000286301.7	c.2632C>A	p.Pro878Thr	missense_variant	20/22	1		ENSP00000286301.3
CSF1R	ENST00000504875.5	n.*453C>A		non_coding_transcript_exon_variant	18/20	1		ENSP00000422212.1
CSF1R	ENST00000504875.5	n.*453C>A		3_prime_UTR_variant	18/20	1		ENSP00000422212.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 02, 2024

This sequence change replaces proline, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 878 of the CSF1R protein (p.Pro878Thr). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individual(s) with hereditary diffuse leukoencephalopathy with spheroids (PMID: 22197934). Advanced 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 at Invitae 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: 24120500). This variant disrupts the p.Pro878 amino acid residue in CSF1R. Other variant(s) that disrupt this residue have been observed in individuals with CSF1R-related conditions (PMID: 30136118, 32430064), which suggests that this may be a clinically significant amino acid residue. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	30
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.85	D
Eigen	Pathogenic	0.85
Eigen_PC	Pathogenic	0.80
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D
M_CAP	Pathogenic	0.75	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.78	D
MutationAssessor	Uncertain	2.5	M
PrimateAI	Uncertain	0.65	T
PROVEAN	Pathogenic	-6.4	D
REVEL	Pathogenic	0.91
Sift	Uncertain	0.0020	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.97
MutPred		0.96		Gain of ubiquitination at K883 (P = 0.115);
MVP		0.95
MPC		0.37
ClinPred		1.0	D
GERP RS		5.0
Varity_R		0.96
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: rs281860280; hg19: chr5-149434822;