chr17-40015491-C-T

Position:

• chr17-40015491-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_172219.3(CSF3):​c.17C>T​(p.Thr6Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000214 in 1,399,152 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: CSF3 NM_172219.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.111

Genes affected

CSF3 (HGNC:2438): (colony stimulating factor 3) This gene encodes a member of the IL-6 superfamily of cytokines. The encoded cytokine controls the production, differentiation, and function of granulocytes. Granulocytes are a type of white blood cell that are part of the innate immune response. A modified form of this protein is commonly administered to manage chemotherapy-induced neutropenia. Alternatively spliced transcript variants have been described for this gene. [provided by RefSeq, May 2020]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.042394668).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CSF3	NM_172219.3	c.17C>T	p.Thr6Ile	missense_variant	1/5	ENST00000394149.8	NP_757373.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CSF3	ENST00000394149.8	c.17C>T	p.Thr6Ile	missense_variant	1/5	1	NM_172219.3	ENSP00000377705.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000214 AC: 3 AN: 1399152 Hom.: 0 Cov.: 33 AF XY: 0.00000290 AC XY: 2 AN XY: 690108

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000278

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 03, 2024

The c.17C>T (p.T6I) alteration is located in exon 1 (coding exon 1) of the CSF3 gene. This alteration results from a C to T substitution at nucleotide position 17, causing the threonine (T) at amino acid position 6 to be replaced by an isoleucine (I). 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	0.19
BayesDel_addAF	Benign	-0.28	T
BayesDel_noAF	Benign	-0.64
CADD	Benign	16
DANN	Benign	0.97
DEOGEN2	Benign	0.31	.;.;T;.
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.50	T;T;T;T
M_CAP	Benign	0.0087	T
MetaRNN	Benign	0.042	T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.34	.;N;N;N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-0.60	.;N;N;N
REVEL	Benign	0.030
Sift	Uncertain	0.0080	.;D;D;D
Sift4G	Uncertain	0.017	D;D;D;D
Polyphen		0.0020	.;.;B;.
Vest4		0.062, 0.059, 0.088
MutPred		0.17		Loss of loop (P = 0.0022);Loss of loop (P = 0.0022);Loss of loop (P = 0.0022);Loss of loop (P = 0.0022);
MVP		0.24
MPC		0.35
ClinPred		0.093	T
GERP RS		2.0
Varity_R		0.044
gMVP		0.29

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: rs1981315744; hg19: chr17-38171744;