Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4
The NM_001177306.2(PAM):āc.440A>Gā(p.Lys147Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000079 in 1,519,722 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (ā ).
PAM (HGNC:8596): (peptidylglycine alpha-amidating monooxygenase) This gene encodes a multifunctional protein. The encoded preproprotein is proteolytically processed to generate the mature enzyme. This enzyme includes two domains with distinct catalytic activities, a peptidylglycine alpha-hydroxylating monooxygenase (PHM) domain and a peptidyl-alpha-hydroxyglycine alpha-amidating lyase (PAL) domain. These catalytic domains work sequentially to catalyze the conversion of neuroendocrine peptides to active alpha-amidated products. Alternative splicing results in multiple transcript variants, at least one of which encodes an isoform that is proteolytically processed. [provided by RefSeq, Jan 2016]
Uncertain significance, criteria provided, single submitter
clinical testing
Ambry Genetics
Apr 13, 2023
The c.440A>G (p.K147R) alteration is located in exon 5 (coding exon 5) of the PAM gene. This alteration results from a A to G substitution at nucleotide position 440, causing the lysine (K) at amino acid position 147 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -