Genetic Variant POU1F1:c.*137_*139dupTTT (chr3-87259754-T-TAAA) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_000306.4(POU1F1):c.*137_*139dupTTT variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000306 in 654,074 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000020 ( 0 hom. )

Consequence

POU1F1
NM_000306.4 3_prime_UTR

Scores

Not classified

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.45

Publications

0 publications found

Variant links:

Genes affected

POU1F1 (HGNC:9210): (POU class 1 homeobox 1) This gene encodes a member of the POU family of transcription factors that regulate mammalian development. The protein regulates expression of several genes involved in pituitary development and hormone expression. Mutations in this genes result in combined pituitary hormone deficiency. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

POU1F1 Gene-Disease associations (from GenCC):

pituitary hormone deficiency, combined, 1
Inheritance: AR, SD, AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
combined pituitary hormone deficiencies, genetic form
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hypothyroidism due to deficient transcription factors involved in pituitary development or function
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
isolated growth hormone deficiency type II
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

POU1F1 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_000306.4. 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
	POU1F1	NM_000306.4	MANE Select	c.137_139dupTTT		3_prime_UTR	Exon 6 of 6	NP_000297.1	P28069-1
	POU1F1	NM_001122757.3		c.137_139dupTTT		3_prime_UTR	Exon 6 of 6	NP_001116229.1	P28069-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
POU1F1	ENST00000350375.7	TSL:1 MANE Select	c.137_139dupTTT	3_prime_UTR	Exon 6 of 6	ENSP00000263781.2	P28069-1
POU1F1	ENST00000344265.8	TSL:5	c.137_139dupTTT	3_prime_UTR	Exon 6 of 6	ENSP00000342931.3	P28069-2
POU1F1	ENST00000561167.5	TSL:5	c.138_140dupTTT	downstream_gene	N/A	ENSP00000454072.1	H0YNM5

Frequencies

GnomAD3 genomes

AF:

0.00000660

AC:

AN:

151538

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:

0.00000199

AC:

AN:

502536

Hom.:

Cov.:

AF XY:

0.00000374

AC XY:

AN XY:

267030

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

13326

American (AMR)

AF:

0.00

AC:

AN:

18580

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

14842

East Asian (EAS)

AF:

0.00

AC:

AN:

30474

South Asian (SAS)

AF:

0.00

AC:

AN:

46816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

31882

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2112

European-Non Finnish (NFE)

AF:

0.00000316

AC:

AN:

316860

Other (OTH)

AF:

0.00

AC:

AN:

27644

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.225

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000660

AC:

AN:

151538

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

73974

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41244

American (AMR)

AF:

0.00

AC:

AN:

15164

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10450

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67894

Other (OTH)

AF:

0.00

AC:

AN:

2084

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

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

1.5

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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3-87259754-TAA-TAAAAA

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over