chr4-99549270-G-G

Variant names:

• chr4-99549270-G-G
• NM_001134665.3:c.

Variant summary

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

The NM_001134665.3(TRMT10A):​c. variant causes a exon region change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TRMT10A NM_001134665.3 exon_region
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.574
• Publications: 0 publications found

Genes affected

TRMT10A (HGNC:28403): (tRNA methyltransferase 10A) This gene encodes a protein that belongs to the tRNA (Guanine-1)-methyltransferase family. A similar gene in yeast modifies several different tRNA species. Mutations in this gene are associated with microcephaly, short stature, and impaired glucose metabolism. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2014]

TRMT10A Gene-Disease associations (from GenCC):

• microcephaly, short stature, and impaired glucose metabolism 1

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P, Genomics England PanelApp
• primary microcephaly-mild intellectual disability-young-onset diabetes syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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_001134665.3. 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
	TRMT10A	NM_001134665.3	MANE Select	c.		exon_region	Exon 8 of 8	NP_001128137.1	Q8TBZ6
	TRMT10A	NM_001134666.3		c.		exon_region	Exon 8 of 8	NP_001128138.1	Q8TBZ6
	TRMT10A	NM_001375880.1		c.		exon_region	Exon 8 of 8	NP_001362809.1	Q8TBZ6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TRMT10A	ENST00000394876.7	TSL:1 MANE Select	c.		exon_region	Exon 8 of 8	ENSP00000378342.2	Q8TBZ6
	TRMT10A	ENST00000273962.7	TSL:1	c.		exon_region	Exon 8 of 8	ENSP00000273962.3	Q8TBZ6
	TRMT10A	ENST00000394877.7	TSL:2	c.		exon_region	Exon 8 of 8	ENSP00000378343.3	Q8TBZ6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.57

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr4-100470427;