De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-Progressive Neurocognitive Syndrome

Elizabeth E. Palmer, Seungbeom Hong, Fatema Al Zahrani, Mais O. Hashem, Fajr A. Aleisa, Heba M.Jalal Ahmed, Tejaswi Kandula, Rebecca Macintosh, Andre E. Minoche, Clare Puttick, Velimir Gayevskiy, Alexander P. Drew, Mark J. Cowley, Marcel Dinger, Jill A. Rosenfeld, Rui Xiao, Megan T. Cho, Suliat F. Yakubu, Lindsay B. Henderson, Maria J. Guillen Sacoto & 23 others Amber Begtrup, Muddathir Hamad, Marwan Shinawi, Marisa V. Andrews, Marilyn C. Jones, Kristin Lindstrom, Ruth E. Bristol, Saima N Kayani, Molly Snyder, María Mercedes Villanueva, Angeles Schteinschnaider, Laurence Faivre, Christel Thauvin, Antonio Vitobello, Tony Roscioli, Edwin P. Kirk, Ann Bye, Jasmeen Merzaban, Łukas Jaremko, Mariusz Jaremko, Rani K. Sachdev, Fowzan S. Alkuraya, Stefan T. Arold

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Polyglutamine expansions in the transcriptional co-repressor Atrophin-1, encoded by ATN1, cause the neurodegenerative condition dentatorubral-pallidoluysian atrophy (DRPLA) via a proposed novel toxic gain of function. We present detailed phenotypic information on eight unrelated individuals who have de novo missense and insertion variants within a conserved 16-amino-acid “HX repeat” motif of ATN1. Each of the affected individuals has severe cognitive impairment and hypotonia, a recognizable facial gestalt, and variable congenital anomalies. However, they lack the progressive symptoms typical of DRPLA neurodegeneration. To distinguish this subset of affected individuals from the DRPLA diagnosis, we suggest using the term CHEDDA (congenital hypotonia, epilepsy, developmental delay, digit abnormalities) to classify the condition. CHEDDA-related variants alter the particular structural features of the HX repeat motif, suggesting that CHEDDA results from perturbation of the structural and functional integrity of the HX repeat. We found several non-homologous human genes containing similar motifs of eight to 10 HX repeat sequences, including RERE, where disruptive variants in this motif have also been linked to a separate condition that causes neurocognitive and congenital anomalies. These findings suggest that perturbation of the HX motif might explain other Mendelian human conditions.

Original languageEnglish (US)
Pages (from-to)542-552
Number of pages11
JournalAmerican Journal of Human Genetics
Volume104
Issue number3
DOIs
StatePublished - Mar 7 2019

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Muscle Hypotonia
Progressive Myoclonic Epilepsy
Epilepsy
Co-Repressor Proteins
Poisons
Amino Acids
Genes

Keywords

  • allelic disorders
  • developmental delay
  • dysmorphic
  • HX repeat
  • intellectual disability

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

Palmer, E. E., Hong, S., Al Zahrani, F., Hashem, M. O., Aleisa, F. A., Ahmed, H. M. J., ... Arold, S. T. (2019). De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-Progressive Neurocognitive Syndrome. American Journal of Human Genetics, 104(3), 542-552. https://doi.org/10.1016/j.ajhg.2019.01.013

De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-Progressive Neurocognitive Syndrome. / Palmer, Elizabeth E.; Hong, Seungbeom; Al Zahrani, Fatema; Hashem, Mais O.; Aleisa, Fajr A.; Ahmed, Heba M.Jalal; Kandula, Tejaswi; Macintosh, Rebecca; Minoche, Andre E.; Puttick, Clare; Gayevskiy, Velimir; Drew, Alexander P.; Cowley, Mark J.; Dinger, Marcel; Rosenfeld, Jill A.; Xiao, Rui; Cho, Megan T.; Yakubu, Suliat F.; Henderson, Lindsay B.; Guillen Sacoto, Maria J.; Begtrup, Amber; Hamad, Muddathir; Shinawi, Marwan; Andrews, Marisa V.; Jones, Marilyn C.; Lindstrom, Kristin; Bristol, Ruth E.; Kayani, Saima N; Snyder, Molly; Villanueva, María Mercedes; Schteinschnaider, Angeles; Faivre, Laurence; Thauvin, Christel; Vitobello, Antonio; Roscioli, Tony; Kirk, Edwin P.; Bye, Ann; Merzaban, Jasmeen; Jaremko, Łukas; Jaremko, Mariusz; Sachdev, Rani K.; Alkuraya, Fowzan S.; Arold, Stefan T.

In: American Journal of Human Genetics, Vol. 104, No. 3, 07.03.2019, p. 542-552.

Research output: Contribution to journalArticle

Palmer, EE, Hong, S, Al Zahrani, F, Hashem, MO, Aleisa, FA, Ahmed, HMJ, Kandula, T, Macintosh, R, Minoche, AE, Puttick, C, Gayevskiy, V, Drew, AP, Cowley, MJ, Dinger, M, Rosenfeld, JA, Xiao, R, Cho, MT, Yakubu, SF, Henderson, LB, Guillen Sacoto, MJ, Begtrup, A, Hamad, M, Shinawi, M, Andrews, MV, Jones, MC, Lindstrom, K, Bristol, RE, Kayani, SN, Snyder, M, Villanueva, MM, Schteinschnaider, A, Faivre, L, Thauvin, C, Vitobello, A, Roscioli, T, Kirk, EP, Bye, A, Merzaban, J, Jaremko, Ł, Jaremko, M, Sachdev, RK, Alkuraya, FS & Arold, ST 2019, 'De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-Progressive Neurocognitive Syndrome', American Journal of Human Genetics, vol. 104, no. 3, pp. 542-552. https://doi.org/10.1016/j.ajhg.2019.01.013
Palmer, Elizabeth E. ; Hong, Seungbeom ; Al Zahrani, Fatema ; Hashem, Mais O. ; Aleisa, Fajr A. ; Ahmed, Heba M.Jalal ; Kandula, Tejaswi ; Macintosh, Rebecca ; Minoche, Andre E. ; Puttick, Clare ; Gayevskiy, Velimir ; Drew, Alexander P. ; Cowley, Mark J. ; Dinger, Marcel ; Rosenfeld, Jill A. ; Xiao, Rui ; Cho, Megan T. ; Yakubu, Suliat F. ; Henderson, Lindsay B. ; Guillen Sacoto, Maria J. ; Begtrup, Amber ; Hamad, Muddathir ; Shinawi, Marwan ; Andrews, Marisa V. ; Jones, Marilyn C. ; Lindstrom, Kristin ; Bristol, Ruth E. ; Kayani, Saima N ; Snyder, Molly ; Villanueva, María Mercedes ; Schteinschnaider, Angeles ; Faivre, Laurence ; Thauvin, Christel ; Vitobello, Antonio ; Roscioli, Tony ; Kirk, Edwin P. ; Bye, Ann ; Merzaban, Jasmeen ; Jaremko, Łukas ; Jaremko, Mariusz ; Sachdev, Rani K. ; Alkuraya, Fowzan S. ; Arold, Stefan T. / De Novo Variants Disrupting the HX Repeat Motif of ATN1 Cause a Recognizable Non-Progressive Neurocognitive Syndrome. In: American Journal of Human Genetics. 2019 ; Vol. 104, No. 3. pp. 542-552.
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AU - Palmer, Elizabeth E.

AU - Hong, Seungbeom

AU - Al Zahrani, Fatema

AU - Hashem, Mais O.

AU - Aleisa, Fajr A.

AU - Ahmed, Heba M.Jalal

AU - Kandula, Tejaswi

AU - Macintosh, Rebecca

AU - Minoche, Andre E.

AU - Puttick, Clare

AU - Gayevskiy, Velimir

AU - Drew, Alexander P.

AU - Cowley, Mark J.

AU - Dinger, Marcel

AU - Rosenfeld, Jill A.

AU - Xiao, Rui

AU - Cho, Megan T.

AU - Yakubu, Suliat F.

AU - Henderson, Lindsay B.

AU - Guillen Sacoto, Maria J.

AU - Begtrup, Amber

AU - Hamad, Muddathir

AU - Shinawi, Marwan

AU - Andrews, Marisa V.

AU - Jones, Marilyn C.

AU - Lindstrom, Kristin

AU - Bristol, Ruth E.

AU - Kayani, Saima N

AU - Snyder, Molly

AU - Villanueva, María Mercedes

AU - Schteinschnaider, Angeles

AU - Faivre, Laurence

AU - Thauvin, Christel

AU - Vitobello, Antonio

AU - Roscioli, Tony

AU - Kirk, Edwin P.

AU - Bye, Ann

AU - Merzaban, Jasmeen

AU - Jaremko, Łukas

AU - Jaremko, Mariusz

AU - Sachdev, Rani K.

AU - Alkuraya, Fowzan S.

AU - Arold, Stefan T.

PY - 2019/3/7

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N2 - Polyglutamine expansions in the transcriptional co-repressor Atrophin-1, encoded by ATN1, cause the neurodegenerative condition dentatorubral-pallidoluysian atrophy (DRPLA) via a proposed novel toxic gain of function. We present detailed phenotypic information on eight unrelated individuals who have de novo missense and insertion variants within a conserved 16-amino-acid “HX repeat” motif of ATN1. Each of the affected individuals has severe cognitive impairment and hypotonia, a recognizable facial gestalt, and variable congenital anomalies. However, they lack the progressive symptoms typical of DRPLA neurodegeneration. To distinguish this subset of affected individuals from the DRPLA diagnosis, we suggest using the term CHEDDA (congenital hypotonia, epilepsy, developmental delay, digit abnormalities) to classify the condition. CHEDDA-related variants alter the particular structural features of the HX repeat motif, suggesting that CHEDDA results from perturbation of the structural and functional integrity of the HX repeat. We found several non-homologous human genes containing similar motifs of eight to 10 HX repeat sequences, including RERE, where disruptive variants in this motif have also been linked to a separate condition that causes neurocognitive and congenital anomalies. These findings suggest that perturbation of the HX motif might explain other Mendelian human conditions.

AB - Polyglutamine expansions in the transcriptional co-repressor Atrophin-1, encoded by ATN1, cause the neurodegenerative condition dentatorubral-pallidoluysian atrophy (DRPLA) via a proposed novel toxic gain of function. We present detailed phenotypic information on eight unrelated individuals who have de novo missense and insertion variants within a conserved 16-amino-acid “HX repeat” motif of ATN1. Each of the affected individuals has severe cognitive impairment and hypotonia, a recognizable facial gestalt, and variable congenital anomalies. However, they lack the progressive symptoms typical of DRPLA neurodegeneration. To distinguish this subset of affected individuals from the DRPLA diagnosis, we suggest using the term CHEDDA (congenital hypotonia, epilepsy, developmental delay, digit abnormalities) to classify the condition. CHEDDA-related variants alter the particular structural features of the HX repeat motif, suggesting that CHEDDA results from perturbation of the structural and functional integrity of the HX repeat. We found several non-homologous human genes containing similar motifs of eight to 10 HX repeat sequences, including RERE, where disruptive variants in this motif have also been linked to a separate condition that causes neurocognitive and congenital anomalies. These findings suggest that perturbation of the HX motif might explain other Mendelian human conditions.

KW - allelic disorders

KW - developmental delay

KW - dysmorphic

KW - HX repeat

KW - intellectual disability

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