chr3-68752952-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_182522.5(TAFA4):​c.197G>A​(p.Arg66His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000737 in 1,614,048 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R66L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00011 ( 1 hom., cov: 32)
Exomes 𝑓: 0.000070 ( 0 hom. )

Consequence

TAFA4
NM_182522.5 missense

Scores

1
6
12

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.68
Variant links:
Genes affected
TAFA4 (HGNC:21591): (TAFA chemokine like family member 4) This gene is a member of the TAFA family which is composed of five highly homologous genes that encode small secreted proteins. These proteins contain conserved cysteine residues at fixed positions, and are distantly related to MIP-1alpha, a member of the CC-chemokine family. The TAFA proteins are predominantly expressed in specific regions of the brain, and are postulated to function as brain-specific chemokines or neurokines, that act as regulators of immune and nervous cells. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Nov 2011]

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.0775432).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect Exon rank MANE Protein UniProt
TAFA4NM_182522.5 linkc.197G>A p.Arg66His missense_variant Exon 4 of 6 ENST00000295569.12 NP_872328.1 Q96LR4A0A024R369
TAFA4NM_001005527.3 linkc.197G>A p.Arg66His missense_variant Exon 4 of 6 NP_001005527.1 Q96LR4A0A024R369
TAFA4XM_011533371.2 linkc.197G>A p.Arg66His missense_variant Exon 4 of 6 XP_011531673.1
TAFA4XM_011533372.2 linkc.197G>A p.Arg66His missense_variant Exon 4 of 6 XP_011531674.1

Ensembl

Gene Transcript HGVSc HGVSp Effect Exon rank TSL MANE Protein Appris UniProt
TAFA4ENST00000295569.12 linkc.197G>A p.Arg66His missense_variant Exon 4 of 6 1 NM_182522.5 ENSP00000295569.7 Q96LR4
TAFA4ENST00000495737.1 linkc.197G>A p.Arg66His missense_variant Exon 4 of 4 4 ENSP00000419439.1 C9JUW7
TAFA4ENST00000634242.1 linkc.*24G>A downstream_gene_variant 5 ENSP00000489092.1 A0A0U1RQN7

Frequencies

GnomAD3 genomes
AF:
0.0000658
AC:
10
AN:
152074
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.0000242
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.000772
Gnomad SAS
AF:
0.00
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.00
Gnomad NFE
AF:
0.0000735
Gnomad OTH
AF:
0.00
GnomAD3 exomes
AF:
0.0000956
AC:
24
AN:
251156
Hom.:
0
AF XY:
0.000118
AC XY:
16
AN XY:
135730
show subpopulations
Gnomad AFR exome
AF:
0.0000615
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.000816
Gnomad SAS exome
AF:
0.0000653
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.0000529
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.0000705
AC:
103
AN:
1461856
Hom.:
0
Cov.:
31
AF XY:
0.0000894
AC XY:
65
AN XY:
727230
show subpopulations
Gnomad4 AFR exome
AF:
0.0000299
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00118
Gnomad4 SAS exome
AF:
0.0000927
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.0000414
Gnomad4 OTH exome
AF:
0.0000166
GnomAD4 genome
AF:
0.000105
AC:
16
AN:
152192
Hom.:
1
Cov.:
32
AF XY:
0.000134
AC XY:
10
AN XY:
74398
show subpopulations
Gnomad4 AFR
AF:
0.000169
Gnomad4 AMR
AF:
0.00
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.000774
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.0000735
Gnomad4 OTH
AF:
0.00
Alfa
AF:
0.0000282
Hom.:
0
Bravo
AF:
0.0000604
TwinsUK
AF:
0.000270
AC:
1
ALSPAC
AF:
0.00
AC:
0
ESP6500AA
AF:
0.00
AC:
0
ESP6500EA
AF:
0.000116
AC:
1
ExAC
AF:
0.000123
AC:
15
Asia WGS
AF:
0.000577
AC:
2
AN:
3478
EpiCase
AF:
0.000109
EpiControl
AF:
0.00

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

not specified Uncertain:1
Dec 02, 2022
Ambry Genetics
Significance: Uncertain significance
Review Status: criteria provided, single submitter
Collection Method: clinical testing

The c.197G>A (p.R66H) alteration is located in exon 4 (coding exon 3) of the FAM19A4 gene. This alteration results from a G to A substitution at nucleotide position 197, causing the arginine (R) at amino acid position 66 to be replaced by a histidine (H). 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
0.11
BayesDel_addAF
Benign
-0.29
T
BayesDel_noAF
Benign
-0.27
CADD
Uncertain
24
DANN
Pathogenic
1.0
DEOGEN2
Benign
0.13
T;.
Eigen
Uncertain
0.45
Eigen_PC
Uncertain
0.45
FATHMM_MKL
Uncertain
0.80
D
LIST_S2
Uncertain
0.88
D;D
M_CAP
Benign
0.0051
T
MetaRNN
Benign
0.078
T;T
MetaSVM
Benign
-0.92
T
MutationAssessor
Benign
1.4
L;.
PrimateAI
Uncertain
0.58
T
PROVEAN
Uncertain
-3.6
D;D
REVEL
Benign
0.11
Sift
Benign
0.074
T;D
Sift4G
Benign
0.16
T;.
Polyphen
0.98
D;.
Vest4
0.37
MVP
0.040
MPC
0.27
ClinPred
0.35
T
GERP RS
4.6
Varity_R
0.20
gMVP
0.45

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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs368834384; hg19: chr3-68802103; COSMIC: COSV99806795; COSMIC: COSV99806795; API