2-27444478-C-G

Variant names:

• chr2-27444478-C-G
• NM_015662.3:c.5204G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_015662.3(IFT172):​c.5204G>C​(p.Ser1735Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,438 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: IFT172 NM_015662.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.96

Genes affected

IFT172 (HGNC:30391): (intraflagellar transport 172) This gene encodes a subunit of the intraflagellar transport subcomplex IFT-B. Subcomplexes IFT-A and IFT-B are necessary for ciliary assembly and maintenance. Mutations in this gene have been associated with skeletal ciliopathies, with or without polydactyly, such as such short-rib thoracic dysplasias 1, 9 or 10. [provided by RefSeq, Mar 2014]

KRTCAP3 (HGNC:28943): (keratinocyte associated protein 3) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12770358).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IFT172	NM_015662.3	c.5204G>C	p.Ser1735Thr	missense_variant	Exon 48 of 48	ENST00000260570.8	NP_056477.1
KRTCAP3	NM_173853.4	c.*298C>G		downstream_gene_variant		ENST00000288873.7	NP_776252.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IFT172	ENST00000260570.8	c.5204G>C	p.Ser1735Thr	missense_variant	Exon 48 of 48	1	NM_015662.3	ENSP00000260570.3
KRTCAP3	ENST00000288873.7	c.*298C>G		downstream_gene_variant		1	NM_173853.4	ENSP00000288873.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461438 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 726998

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: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	21
DANN	Benign	0.95
DEOGEN2	Benign	0.14	T
Eigen	Benign	-0.16
Eigen_PC	Benign	0.072
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.81	T
M_CAP	Benign	0.0093	T
MetaRNN	Benign	0.13	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.55	N
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-0.84	N
REVEL	Benign	0.062
Sift	Benign	0.38	T
Sift4G	Benign	0.47	T
Polyphen		0.012	B
Vest4		0.13
MutPred		0.28		Gain of ubiquitination at K1732 (P = 0.0741);
MVP		0.27
MPC		0.17
ClinPred		0.50	D
GERP RS		5.6
Varity_R		0.21
gMVP		0.42

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-27667345;