rs281860277

Variant names:

• chr5-150056034-A-G
• rs281860277
• NM_001288705.3:c.2546T>C

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP3_Strong PP5

The NM_001288705.3(CSF1R):​c.2546T>C​(p.Phe849Ser) 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 Likely pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F849I) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CSF1R NM_001288705.3 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.23
• Publications: 9 publications found

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 Gene-Disease associations (from GenCC):

• hereditary diffuse leukoencephalopathy with axonal spheroids and pigmented glia

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Genomics England PanelApp, Orphanet
• brain abnormalities, neurodegeneration, and dysosteosclerosis

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• leukoencephalopathy, diffuse hereditary, with spheroids 1

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• early-onset calcifying leukoencephalopathy-skeletal dysplasia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PM1: In a hotspot region, there are 6 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 10 uncertain in NM_001288705.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr5-150056035-A-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3251449.Status of the report is criteria_provided_single_submitter, 1 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant 5-150056034-A-G is Pathogenic according to our data. Variant chr5-150056034-A-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3901844.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CSF1R	NM_001288705.3	c.2546T>C	p.Phe849Ser	missense_variant	Exon 18 of 21	ENST00000675795.1	NP_001275634.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CSF1R	ENST00000675795.1	c.2546T>C	p.Phe849Ser	missense_variant	Exon 18 of 21		NM_001288705.3	ENSP00000501699.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

CSF1R-related leukoencephalopathy Pathogenic:1

Jun 11, 2021

Neurology Laboratory, National Cheng Kung University Hospital

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: research

This variant results in a Phenylalanine to Serine substitution at codon 849 of the CSF1R protein (p.Phe849Ser). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.79	D
Eigen	Pathogenic	0.75
Eigen_PC	Pathogenic	0.72
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D
M_CAP	Pathogenic	0.74	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.60	D
MutationAssessor	Benign	1.8	L
PhyloP100		9.2
PrimateAI	Pathogenic	0.85	D
PROVEAN	Pathogenic	-6.5	D
REVEL	Pathogenic	0.93
Sift	Uncertain	0.017	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.90		Gain of glycosylation at F849 (P = 0.0272);
MVP		0.97
MPC		4.3
ClinPred		1.0	D
GERP RS		4.9
Varity_R		0.95
gMVP		0.98
Mutation Taster		=0/100	disease causing (ClinVar)

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: rs281860277; hg19: chr5-149435597;