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. 2023 Oct 25;110(11):1959–1975. doi: 10.1016/j.ajhg.2023.10.007

Table 2.

Proband phenotypes and molecular data

Proband
1 2 3 4 5 6 7 8 9 10 11 12 13
Sexa M M F M M F F M M F F M F
Age (years) 2 9 8 13 11 4 3 11 18 13 22 18 13
Ethnicityb NE NE NE Arab NE NE + A NE NE NE NE NE NE + H NE

Molecular data

Variant p.Arg89
Glyfs8
p.Leu229Phe p.? p.Lys251
Asn
p.Arg256Gly p.Phe
267del
p.Gly271
Asp
p.Ile301
del
p.Arg362
Cys
p.Ser541
Tyr
p.Arg625
Pro
p.Arg753
Trp
p.Pro298
Ser
Variant typec FS D1 splice D1 D1 D1Δ D1 D1Δ D1 D2 D2 D2 D1
ATPase functiond N/A N/A + + + ++

DD and IDe

Gross motor delay mild mod mild sev mod mod sev sev mild mild mild absent-mild mild
Fine motor delay mild mod + + + + + + + + + +
Speech delay mild-mod sev sev mild mod sev sev mod mod mild mod
ID mod sev mild-mod sev sev mild mild mild-mod − (↓IQ) mod

Neurological and psychiatric disorders

ADHD + + + + +
Autism + f + +
Anxiety + + + +
Hypotonia + + + + + + + + + + + +
Epilepsy g + + +
Tremor + + + +
Macrocephalyh + + rel + + + + + + + +
Abnormal MRI + + + + + + + + + + +

Congenital defects and other featuresi

Dysmorphic + + + + + + + +
MSK + + + + + + + + +
Ophthalmic + + + + + + + +
GI + + + + + + + +
GU + + + + +
Cardiac + + +

Aggregated phenotypic data for the 13 probands in our cohort. Unless otherwise noted, a plus sign (+) indicates the presence of the symptom or finding, and a minus sign (−) indicates the absence of the symptom or finding.

a

Sex assigned at birth: M, male; F, female.

b

NE, northern European; A, Asian; H, Hispanic; +, proband shares both ancestries.

c

FS, frameshift; D1Δ, in-frame deletion in D1; D1 or D2, missense in this domain.

d

ATPase function was higher (+), much higher (++), or lower (−) than wild-type function (see Figure 2C). N/A, not available.

e

DD is qualified as mild (≤2× months to milestone), moderate (mod; >2× normal), or severe (sev; milestone never reached), and ID is based on an IQ score < 70 and/or clinical impression: mild IQ = 55–70, moderate IQ = 35–55, and severe IQ < 35 according to DSM-IV criteria. Absent-mild, absent to mild; mild-mod, mild to moderate.

f

Some features of autism.

g

EEG with epileptic activity but no clinical seizures.

h

Macrocephaly was absolute (+) or relative (rel).

i

For specifics on dysmorphic features and congenital defects, see Tables 3 and S5. MSK, musculoskeletal; GI, gastrointestinal; GU, genitourinary.