Alterations in filamin mutations fine tune muscle protein aggregates

Myofibrillar myopathies are genetically inherited, incurable muscle disorders which cause progressive muscle weakness in skeletal muscles. A subtype of myofibrillar myopathy called filaminopathy is caused by aggregation of filamin C and actin in the sarcomeric structures of skeletal muscle fibers. I...

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Bibliografiset tiedot
Päätekijä: Kotala, Kerttu
Muut tekijät: Faculty of Sciences, Matemaattis-luonnontieteellinen tiedekunta, Department of Biological and Environmental Science, Bio- ja ympäristötieteiden laitos, University of Jyväskylä, Jyväskylän yliopisto
Aineistotyyppi: Pro gradu
Kieli:eng
Julkaistu: 2024
Aiheet:
Linkit: https://jyx.jyu.fi/handle/123456789/95280
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author Kotala, Kerttu
author2 Faculty of Sciences Matemaattis-luonnontieteellinen tiedekunta Department of Biological and Environmental Science Bio- ja ympäristötieteiden laitos University of Jyväskylä Jyväskylän yliopisto
author_facet Kotala, Kerttu Faculty of Sciences Matemaattis-luonnontieteellinen tiedekunta Department of Biological and Environmental Science Bio- ja ympäristötieteiden laitos University of Jyväskylä Jyväskylän yliopisto Kotala, Kerttu Faculty of Sciences Matemaattis-luonnontieteellinen tiedekunta Department of Biological and Environmental Science Bio- ja ympäristötieteiden laitos University of Jyväskylä Jyväskylän yliopisto
author_sort Kotala, Kerttu
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description Myofibrillar myopathies are genetically inherited, incurable muscle disorders which cause progressive muscle weakness in skeletal muscles. A subtype of myofibrillar myopathy called filaminopathy is caused by aggregation of filamin C and actin in the sarcomeric structures of skeletal muscle fibers. In this Pro Gradu, the aggregation of filamin was investigated in the indirect flight muscles of Drosophila melanogaster by expressing an open conformation mutation separately in one domain pair and two domain pairs. The mutations were located in the mechanosensory region of filamin and they were assumed to open the structure of the domain pairs. I found that single-open mutation resulted in less aggregates than double-open mutation. However, single-open aggregates were larger and less round than double-open aggregates. Also, single-open aggregates located in muscle fiber Z-disc structures whereas double-open aggregates located in between myofibrils. Upon time, single-open aggregates’ volume increased, and shape developed to rounder. These findings suggest that, firstly, an open conformation mutation in one domain pair is enough for aggregate formation. Secondly, differing mutations might affect the localization of forming aggregates during tissue development. And finally, the localization of aggregates restricts the shape development of the aggregates. These detailed findings were partly unexpected and shed light on mechanisms of sarcomeric protein aggregate formation and clearance in muscle.
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A subtype of myofibrillar myopathy called filaminopathy is caused by aggregation of filamin C and actin in the sarcomeric structures of skeletal muscle fibers. In this Pro Gradu, the aggregation of filamin was investigated in the indirect flight muscles of Drosophila melanogaster by expressing an open conformation mutation separately in one domain pair and two domain pairs. The mutations were located in the mechanosensory region of filamin and they were assumed to open the structure of the domain pairs. I found that single-open mutation resulted in less aggregates than double-open mutation. However, single-open aggregates were larger and less round than double-open aggregates. Also, single-open aggregates located in muscle fiber Z-disc structures whereas double-open aggregates located in between myofibrils. Upon time, single-open aggregates\u2019 volume increased, and shape developed to rounder. 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spellingShingle Kotala, Kerttu Alterations in filamin mutations fine tune muscle protein aggregates cheerio Drosophila melanogaster myofibrillar myopathy Cell and molecular biology Solu- ja molekyylibiologia 4013 filamiinit lihassairaudet filamins muscular diseases
title Alterations in filamin mutations fine tune muscle protein aggregates
title_full Alterations in filamin mutations fine tune muscle protein aggregates
title_fullStr Alterations in filamin mutations fine tune muscle protein aggregates Alterations in filamin mutations fine tune muscle protein aggregates
title_full_unstemmed Alterations in filamin mutations fine tune muscle protein aggregates Alterations in filamin mutations fine tune muscle protein aggregates
title_short Alterations in filamin mutations fine tune muscle protein aggregates
title_sort alterations in filamin mutations fine tune muscle protein aggregates
title_txtP Alterations in filamin mutations fine tune muscle protein aggregates
topic cheerio Drosophila melanogaster myofibrillar myopathy Cell and molecular biology Solu- ja molekyylibiologia 4013 filamiinit lihassairaudet filamins muscular diseases
topic_facet 4013 Cell and molecular biology Drosophila melanogaster Solu- ja molekyylibiologia cheerio filamiinit filamins lihassairaudet muscular diseases myofibrillar myopathy
url https://jyx.jyu.fi/handle/123456789/95280 http://www.urn.fi/URN:NBN:fi:jyu-202405294045
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