NM_017849.4:c.71C>G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_017849.4(TMEM127):c.71C>G(p.Pro24Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000013 in 1,538,266 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. P24P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 7.2e-7 ( 0 hom. )

Consequence

TMEM127
NM_017849.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 8.37

Publications

0 publications found

Variant links:

Genes affected

TMEM127 (HGNC:26038): (transmembrane protein 127) This gene encodes a transmembrane protein with four predicted transmembrane domains. The protein is associated with a subpopulation of vesicular organelles corresponding to early endosomal structures, with the Golgi, and with lysosomes, and may participate in protein trafficking between these structures. Mutations in this gene and several other genes cause pheochromocytomas. Alternatively spliced transcript variants encoding the same protein have been identified. [provided by RefSeq, Aug 2022]

TMEM127 Gene-Disease associations (from GenCC):

hereditary pheochromocytoma-paraganglioma
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
pheochromocytoma
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P
renal cell carcinoma
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp

TMEM127 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017849.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TMEM127	NM_017849.4	MANE Select	c.71C>G	p.Pro24Arg	missense	Exon 2 of 4	NP_060319.1
TMEM127	NM_001193304.3		c.71C>G	p.Pro24Arg	missense	Exon 2 of 4	NP_001180233.1
TMEM127	NM_001407283.1		c.-9+558C>G		intron	N/A	NP_001394212.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
TMEM127	ENST00000258439.8	TSL:1 MANE Select	c.71C>G	p.Pro24Arg	missense	Exon 2 of 4	ENSP00000258439.3
TMEM127	ENST00000432959.2	TSL:1	c.71C>G	p.Pro24Arg	missense	Exon 2 of 4	ENSP00000416660.1
TMEM127	ENST00000713754.1		n.71C>G		non_coding_transcript_exon	Exon 2 of 4	ENSP00000519055.1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

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:

7.21e-7

AC:

AN:

1386048

Hom.:

Cov.:

AF XY:

0.00000146

AC XY:

AN XY:

684108

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31702

American (AMR)

AF:

0.00

AC:

AN:

36104

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25134

East Asian (EAS)

AF:

0.00

AC:

AN:

35954

South Asian (SAS)

AF:

0.00

AC:

AN:

79540

European-Finnish (FIN)

AF:

0.00

AC:

AN:

34842

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5028

European-Non Finnish (NFE)

AF:

9.26e-7

AC:

AN:

1079892

Other (OTH)

AF:

0.00

AC:

AN:

57852

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74372

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41462

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5206

South Asian (SAS)

AF:

0.00

AC:

AN:

4834

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

314

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Mar 26, 2025

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge

Hereditary cancer-predisposing syndrome

Uncertain:1

May 15, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.P24R variant (also known as c.71C>G), located in coding exon 1 of the TMEM127 gene, results from a C to G substitution at nucleotide position 71. The proline at codon 24 is replaced by arginine, an amino acid with dissimilar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Hereditary pheochromocytoma-paraganglioma

Uncertain:1

Sep 06, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces proline, which is neutral and non-polar, with arginine, which is basic and polar, at codon 24 of the TMEM127 protein (p.Pro24Arg). This variant is present in population databases (no rsID available, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with TMEM127-related conditions. ClinVar contains an entry for this variant (Variation ID: 532522). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.48

BayesDel_addAF

Pathogenic

0.37

BayesDel_noAF

Pathogenic

0.29

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.21

Eigen

Uncertain

0.37

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.90

LIST_S2

Benign

0.85

M_CAP

Uncertain

0.28

MetaRNN

Uncertain

0.68

MetaSVM

Uncertain

-0.23

MutationAssessor

Benign

1.9

PhyloP100

8.4

PrimateAI

Pathogenic

0.90

PROVEAN

Uncertain

-3.1

REVEL

Pathogenic

0.67

Sift

Uncertain

0.013

Sift4G

Pathogenic

0.0

Polyphen

0.66

Vest4

0.77

MutPred

0.24

Gain of MoRF binding (P = 0.0032)

MVP

0.73

MPC

0.44

ClinPred

0.97

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.51

gMVP

0.81

Mutation Taster

=38/62

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over