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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 previewTextbook of Veterinary Physiological Chemistry (2016)

Veterinary medicine, Veterinary medicine by CTI 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 previewFoods , Experimental Perspectives (2016)

by CTI 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 previewVander's Human Physiology, The Mechanisms of Body Function (2016)

Medicine, Human anatomy by CTI 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 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 previewChemistry, Cell Biology, and Genetics (2016)

by CTI Reviews

Actin is a globular multifunctional protein that forms microfilaments. It is found in all eukaryotic cells ( the ...

Google previewBiology, Chemistry, Cell Biology and Genetics (2016)

by CTI Reviews

Actin is a globular multifunctional protein that forms microfilaments. It is found in all eukaryotic cells (the only known exception being nematode sperm), ...

Google previewThe Neuropsychology of Cortical Dementias (2014)

by Mary Anderson, PhD

Actin is the most important element of the cytoskeleton and its rapid conversion from a globular to filamentous form and back is key to many intracellular processes. This conversion is regulated by a number of factors , ...

Google previewMuscle and Meat Biochemistry (2012)

by A.M. Pearson

ACTIN A. INTRODUCTION Actin is the second most abundant myofibrillar protein in the myofibrils of cardiac and skeletal muscles, composing approximately 20% of the total. It is a highly conserved protein that will polymerize into filaments that ...

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 previewMosby's Dental Dictionary (2007)

by Elsevier, Mosby

contractor, independent structure with working units built up largely from two proteins, actin and myosin, which appear to be organized into separate filaments running longitudinally through the muscle fibers. Neither type of filament runs ...

Google previewHuman Biology (Collins Internet-Linked Dictionary of) (2017)

by Dr Robert M. Youngson

Actin filaments are also abundant inside all nucleated cells where they form the cytoskeleton, determining cell shape and, in the case of amoebic cells, cell movement. An actin contractile ring forms around the equator of a dividing cell at the ...

Google previewThe new international encyclopaedia (1905)

by Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby

Vertical aspect of an Actiniarian, showing mouth and tentacles. 2. Sectional view : a, simple digestive sac ; 6, structure of the body-wall, showing septa. ACTIN'OGRAPH (Ok. ixr/c, aktis, ray + ypatpitv, graphein, to write) .

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Actin

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Small photo of Real fluorescence microscopic view of human skin cells in culture. Nucleus are in blue, actin filaments are in red, tubulin was labeled with greenSmall photo of Real fluorescence microscopic view of human skin cells in culture. Actin filaments are labeled with yellow stainingSmall 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 red, tubulin was labeled with greenSmall 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 red, tubulin was labeled with greenSmall photo of Confocal microscopy imaging of two cancer cells. Cytoskeletal protein actin in red, nucleus in blue. 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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