Table 1 Details on the 11 samples where Gauchian and Sanger are inconsistent

From: Reply to: Is Gauchian genotyping of GBA1 variants reliable?

 

Gauchian calls

Sanger Assessment, Tayebi et al.

Our assessment

Sample

Copy Number of GBA1 and GBAP1

GBAP1-like variant in exons 9–11

Other unphased variants

Genotype

Prediction

 

Pat_08

4

None

p.Asn409Ser

p.Asn409Ser/p.Gln389Ter

False Negative

Missed variant Gln389Ter is not on Gauchian’s target list

Pat_28

4

None

p.Arg535His

p.Arg535His/Cys381Tyr

False Negative

Missed variant Cys381Tyr is not on Gauchian’s target list

Pat_58

4

None

p.Asn409Ser, p.Arg296Ter

p.Asn409Ser, p.Arg296Ter, c.203delC

False Negative

Missed variant c.203delC is not on Gauchian’s target list

Pat_26

4

None

p.Asn409Ser

p.Asn409Ser/p.Arg502Cys

False Negative

Missed variant Arg502Cys (should be Arg502His) is not on Gauchian’s target list.

Tayebi et al.’s Supplementary Fig. 1 shows no variant at p.Arg502Cys (c.1504 C > T), but a different variant at the neighboring position, p.Arg502His (c.1505 G > A), which is not on Gauchian’s target list.

Pat_75

None (No Call)

NA

NA

p.Arg502Cys/p.Arg159Trp

Missed

Copy number is a no-call due to high variation in depth so no further variant calling was performed. Coverage MAD 0.269

Pat_76

None (No Call)

NA

NA

p.Asn409Ser/p.Asn409Ser

Missed

Copy number is a no-call due to high variation in depth so no further variant calling was performed. Coverage MAD 0.128

Pat_79

None (No Call)

NA

NA

p.Leu483Pro/p.Arg502Cys

Missed

Copy number is a no-call due to high variation in depth so no further variant calling was performed. Coverage MAD 0.127

Pat_03

4

None

p.Asn409Ser

p.Asn409Ser/p.Asn409Ser

False Negative

Gauchian call is supported by reads, see Tayebi et al.’s Supplementary Fig. 1.

Pat_47

4

None

p.Asn409Ser

p.Asn409Ser/p.Leu483Pro

False Negative

True false negative

Pat_16

3

c.1263del+RecTL/

p.Asn409Ser, p.Asn409Ser

p.Asn409Ser, c.1263del+RecTL

False Positive

Heterozygous p.Asn409Ser misgenotyped as homozygous as Gauchian did not know the exact breakpoint of the c.1263del+RecTL deletion, which is very close to p.Asn409Ser.

Pat_92

7

p.Asp448His/p.Leu483Pro,p.Asp448His

 

p.Asp448His/ p.Leu483Pro+Rec7

False Negative

There is no false negative. Rec7 is reflected in the copy number call (copy number gain). This GBAP1 duplication does not have any functional impact on GBA1, so Gauchian does not report it as a GBA1 variant. Heterozygous p.Asp448His misgenotyped as homozygous.