NM_022777.4:c.398G>A

Variant names:

• chr7-101316351-C-T
• NM_022777.4:c.398G>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 2P and 6B. PM2 BP4_Strong BP6_Moderate

The NM_022777.4(IFT22):​c.398G>A​(p.Ser133Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,613,988 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: IFT22 NM_022777.4 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 0.0550
• Publications: 0 publications found

Genes affected

IFT22 (HGNC:21895): (intraflagellar transport 22) Predicted to enable GTPase activity. Predicted to be involved in intracellular protein transport. Predicted to be located in ciliary tip. Predicted to be part of intraciliary transport particle B. Predicted to be active in endomembrane system. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.023216218).
• BP6: Variant 7-101316351-C-T is Benign according to our data. Variant chr7-101316351-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 3285425.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022777.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IFT22	NM_022777.4	MANE Select	c.398G>A	p.Ser133Asn	missense	Exon 4 of 5	NP_073614.1	Q9H7X7-1
	IFT22	NM_001130820.3		c.308G>A	p.Ser103Asn	missense	Exon 3 of 4	NP_001124292.1	Q9H7X7-2
	IFT22	NM_001130821.3		c.167G>A	p.Ser56Asn	missense	Exon 4 of 5	NP_001124293.1	Q9H7X7-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IFT22	ENST00000315322.10	TSL:1 MANE Select	c.398G>A	p.Ser133Asn	missense	Exon 4 of 5	ENSP00000320359.4	Q9H7X7-1
	IFT22	ENST00000437644.2	TSL:1	c.308G>A	p.Ser103Asn	missense	Exon 3 of 4	ENSP00000390770.2	Q9H7X7-2
	IFT22	ENST00000468833.1	TSL:1	n.312G>A		non_coding_transcript_exon	Exon 2 of 2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152134 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461854 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 727228

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111982

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152134 Hom.: 0 Cov.: 31 AF XY: 0.0000135 AC XY: 1 AN XY: 74318

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41446

American (AMR) AF: 0.00 AC: 0 AN: 15246

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10616

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68028

Other (OTH) AF: 0.00 AC: 0 AN: 2084

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.056
BayesDel_addAF	Benign	-0.40	T
BayesDel_noAF	Benign	-0.81
CADD	Benign	5.8
DANN	Benign	0.64
DEOGEN2	Benign	0.027	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.019	N
LIST_S2	Benign	0.45	T
M_CAP	Benign	0.0085	T
MetaRNN	Benign	0.023	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.20	N
PhyloP100		0.055
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.24	N
REVEL	Benign	0.039
Sift	Benign	0.66	T
Sift4G	Benign	1.0	T
Polyphen		0.0	B
Vest4		0.067
MutPred		0.28		Gain of catalytic residue at S133 (P = 0.0208)
MVP		0.10
MPC		0.25
ClinPred		0.069	T
GERP RS		-1.7
Varity_R		0.030
gMVP		0.083
Mutation Taster		=97/3	polymorphism

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

hg19: chr7-100959632;