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Actin

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Definition of the noun actin

What does actin mean as a name of something?

noun - plural: actins

  1. one of the proteins into which actomyosin can be split; can exist in either a globular or a fibrous form
    • lexical domain: Substances - nouns denoting substances
    • more generic term: simple protein = a protein that yields only amino acids when hydrolyzed
    • substance of: actomyosin = a protein complex in muscle fibers; composed of myosin and actin

Alternative definition of the noun actin

noun

  1. [protein, uncountable] A globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament).
  2. [protein, countable] One of the six isoforms of actin.

Explanation

Actin is a globular multi-functional protein that forms microfilaments. It is found in all eukaryotic cells, where it may be present at concentrations of over 100 μM. An actin protein's mass is roughly 42-kDa and it is the monomeric subunit of two types of filaments in cells: microfilaments, one of the three major components of the cytoskeleton, and thin filaments, part of the contractile apparatus in muscle cells. It can be present as either a free monomer called G-actin or as part of a linear polymer microfilament called F-actin both of which are essential for such important cellular functions as the mobility and contraction of cells during cell division.

  • also known as 肌动蛋白

Printed dictionaries and other books with definitions for Actin

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Google previewe-Study Guide for: Exercise Physiology : Human Bioenergetics and Its Applications by George A. Brooks, ISBN 9780072556421 (2012)

by Cram101 Textbook Reviews

Actin is a globular, roughly 42kDa protein found in all eukaryotic cells (the only known exception being nematode...

Actin is the monomeric subunit of two types of filaments in cells: microfilaments, one of the three major components of the ...

Google previewNeurobiology of Actin (2010)

From Neurulation to Synaptic Function by Gianluca Gallo, Lorene M Lanier

Actin is a globular protein with a molecular weight of 43 kDa consisting of 375 amino acids. Individual...

Google previewe-Study Guide for: Memmlers the Human Body in Health and Disease (2012)

by Cram101 Textbook Reviews

Actin is a globular, roughly 42-kDa protein found in all eukaryotic cells (the only known exception being nematode...

Actin is the monomeric subunit of two types of filaments Action potential Contractility Myosin in cells: microfilaments, one of ...

Google previewe-Study Guide for: Lehninger Principles of Biochemistry by David L. Nelson, ISBN 9780716771081 (2013)

by Cram101 Textbook Reviews

Actin: Actin Actin is a globular, roughly 42kDa moonlighting protein found in all eukaryotic cells (the only known...

Actin is the monomeric subunit of two typesof filaments in cells: microfilaments, one of the three major components of the ...

Google previewSeeleys Anatomy and Physiology (2016)

by Cram101 Textbook Reviews

Actin: Actin is a globular, roughly 42kDa protein found in all eukaryotic cells (the only known exception being...

Actin is the monomeric subunit of two types of filaments in cells: microfilaments, one of the three major components of the ...

Google previewAnatomy and Physiology, The Unity of Form and Function (2015)

by Cram101 Textbook Reviews

thin filaments: Actin is a globular, roughly 42kDa protein found in all eukaryotic cells ( the ...

Google previewBrunnstrom's Clinical Kinesiology (2015)

Medicine, Internal medicine by Cram101 Textbook Reviews

Actin: Actin is a globular, roughly 42kDa protein found in all eukaryotic cells (the only known exception being...

Actin is the monomeric subunit of two types of filaments in cells: microfilaments, one of the three major components of the ...

Google previewe-Study Guide for: Respiratory Care Anatomy and Physiology (2012)

by Cram101 Textbook Reviews

Actin: Actin is a globular, roughly 42kDa protein found in all eukaryotic cells (the only known exception being nematode sperm) where it may be present at concentrations of over 100...

Actin is the monomeric subunit of two types of filaments in ...

Google previewFabrication, Characterization and Application of the Novel Bionanomaterials (2008)

Actin is a globular structural protein with molecular weight of 42 kDa and diameter of 5 nm. It is one of the key proteins involved in muscle contraction, cell division and migration. Actin is the most abundant protein in typical eukaryotic cells ...

Google previewe-Study Guide for: Science of Nutrition by Janice Thompson, ISBN 9780805394351 (2012)

by Cram101 Textbook Reviews

Actin is a globular, roughly 42-kDa protein found in all eukaryotic cells (the only known exception being nematode...

Actin is the monomeric subunit of two types of filaments in cells: microfilaments, one of the three major components of the ...

Google previewNerves and Muscle (1977)

by Michael Eraut

Actin is the principal, but not the only, component of the thin filaments; myosin is the principal component of the thick...

Highly purified actin is a globular protein, consisting of a single polypeptide chain, with a molecular weight of about ...

Google previewTextbook of Veterinary Physiological Chemistry (2015)

Veterinary medicine, Veterinary medicine by Cram101 Textbook Reviews

Actin is a globular, roughly 42kDa moonlighting protein found in all eukaryotic cells (the only known exception being...

Actin is the monomeric subunit of two types of filaments in cells: microfilaments, one of the three major components of the ...

Google previewNature's Versatile Engine: (2007)

Insect Flight Muscle Inside and Out by Jim Vigoreaux

Actin is a major constituent of all muscles, including insect flight muscles. Stoichiometri- cally it is the most prevalent myofibrillar protein. As filamentous F- actin it is the structural core of the sarcomeric thin filaments. Within the thin filament actin ...

Google previewEukaryotic Membranes and Cytoskeleton (2008)

Origins and Evolution by Gáspár Jékely

Actin is a remarkably conserved protein, with overall identity about 85% between the most divergent family members. However, most species possess multiple actin isoforms exhibiting both structural and functional differences. The number of ...

Google previewKaplan SAT Subject Test Biology E/M 2015-2016 (2015)

by Kaplan

ZAa ZBa ZCa ZDa ZEa ovaryć fallopian tubeć uterusć cervixć vaginać Which of the following statements about skeletal muscle tissue is TRUEC Ỷć ZAa ZBa In the muscle fiberĉ actin is the thick filamentć The sarcoplasmic reticulum regulates ...

Google previewA Dictionary of Biomedicine (2010)

by John Lackie

actin A highly conserved and possibly the most abundant eukaryotic protein (377 aa), that constitutes 10-20% of the total cellular protein content. Globular (G) actin will assemble into filamentous (F) ...

Google previewEncyclopedia of Molecular Mechanisms of Disease (2009)

With 213 Tables by Florian Lang

Acute Colonic Pseudo-Obstruction 29 sarcomeric actin, demonstrated by immunohistochemistry and immunoelectron microscopy, only α-actinin, a major protein of Z bands, rods/nemaline bodies, and α-B crystallin, the molecular heat- shock or ...

Google previewEncyclopedia of Genetics, Genomics, Proteomics, and Informatics (2008)

by George P. Rédei

Jasplakinolide and Latrunculin B Actin chromosome 2. ▷animal hormones ...

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Actin

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Small photo of Real fluorescence microscopic view of human skin cells in culture. Actin filaments are labeled with green stainingSmall photo of Real fluorescence microscopic view of human skin cells in culture. Nucleus are in blue, actin filaments are in green, tubulin was labeled with greenSmall photo of Confocal microscopy imaging of two cancer cells touching each other. Cytoskeletal protein actin in red, nucleus in blue.Small photo of Real fluorescence microscopic view of human skin cells in culture. Nucleus are in blue, actin filaments are in green, tubulin was labeled with redSmall photo of Real fluorescence microscopic view of human skin cells in culture. Actin filaments are labeled with yellow stainingSmall photo of Single cancer cell invading during the metastatic process. Visible nucleus and actin filaments.Small photo of Real fluorescence microscopic view of human skin cells in culture. Nucleus are in blue, actin filaments are in green, tubulin was labeled with red More...

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Scrabble value of A1C3T1I1N1

The value of this 5-letter word is 7 points. It is included in the first and second editions of the Official Scrabble Players Dictionary.

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