Hi all,

I have some lof variants and I want to know if they have already been detected in GNOMAD (I am essentially curious if my lof variants are novel).

In order to make this comparison to GNOMAD I have run my variants through LOFTEE and am getting some surprising results. The vast majority of my variants are marked as low confidence because they did not pass the NON_CAN_SPLICE_SURR filter. With that said I have found variants on GNOMAD that are HC that are almost in the same position, and on the same transcript.

So does GNOMAD use the NON_CAN_SPLICE_SURR filter?

For example, from my data I have the following frameshift variant:

7:140373880-140373881 (GA/-) (ENST00000072869)
IMPACT=HIGH;STRAND=1;LoF=LC;LoF_filter=NON_CAN_SPLICE_SURR;...

While in GNOMAD there is a frameshift variant on the same gene right next to it that does not have that same LoF_filter, and is marked as high confidence:

7-140373879-TGA-T https://gnomad.broadinstitute.org/variant/7-140373879-TGA-T?dataset=gnomad_r2_1

Furthermore, after looking at the GNOMAD flagship paper Extended Data Figure 5, there is no mention of the NON_CAN_SPLICE_SURR filter.

Any help clarifying this up is appreciated :)