Actin

Actin is a globular structural protein that polymerizes in a helical fashion to form an actin filament (or microfilament). These form the cytoskeleton - a three-dimensional network inside an eukaryotic cell.
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Acting is the work of an actor/actress, a person in theatre, film, or any other storytelling medium who tells the story by portraying a character and, usually, speaking or singing the written text or play.
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Actin is a globular protein that polymerize helicaly forming actin filaments (or microfilaments), which like the other two components of the cellular cytoskeleton form a three-dimensional network inside an eukariotic cell.
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Many membrane-bound components that regulate actin cytoskeleton dynamics and cell-surface motility associate with PtdIns(4,5)P2-rich lipid rafts.
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Actin:
A protein of 42 kD, very abundant in eukaryotic cells (8-14% total cell protein) and one of the major components of the actomyosin motor and the cortical microfilament meshwork.
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Actin Filaments
Monomers of the protein actin polymerize to form long, thin fibers. These are about 8 nm in diameter and, being the thinnest of the cytoskeletal filaments, are also called microfilaments.
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Acting Director, Data Acquisition and Curation
GDB also appointed Michael A. Chipperfield as Acting Director of Data Acquisition and Curation, effective October 1. Chipperfield assumed the position held for the past 4 years by A.
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actin: a protein filament within the sarcomeres of muscle cells.
action: potential occurs when a neuron is displaying a nerve impulse.
active site: the portion of an enzyme that interacts with the substrate.
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actin - protein which when polymerized forms microfilaments, part of the cytoskeleton and necessary for cytokinesis and other cellular functions.
agglutination - the state of joining or clumping together by adhesion.
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actin
[Gk. aktis, a ray]
A globular protein that links into chains, two of which twist helically about each other, forming microfilaments in muscle and other contractile elements in cells.
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actin The protein from which microfilaments are composed; forms the contractile filaments of sarcomeres in muscle cells.
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actin A protein in a muscle fiber that, together with myosin, is responsible for contraction and relaxation.
actinomorphic Regular or radially symmetric flowers.
actinotroch Larval form found in Phoronida.
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Actin filaments assist in the movement of nearly all eukaryotic cells.
Microvilli and pseudopodia move by the action of actin filaments.
Actin filaments are important in muscle contraction.
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-acting gene
: A gene acting on or co-operating with another gene on the same chromosome (see
trans-acting gene
).
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Trans acting factor
A molecule that can diffuse through the cell to act at a distance from where it is made.
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The forces acting to cause one genotype to be more fertile than another genotype.
Related Terms: Genotype
The term proposed by Johannsen (1909) for the hereditary constitution of an individual, or of particular nuclei within its cells.
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The forces acting to cause differential mortality of an organism at any stage (other than gametes) in its life cycle.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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Dominant(-acting) oncogene. A gene that stimulates cell proliferation and contributes to oncogenesis when present in a single copy. (See Oncogene.) Dormancy.
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Contiguous genes -- genes physically close on a chromosome that when acting together express a phenotype.
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actin A protein (~ kDa) making up the thin filaments of muscle and cytoskeleton of eukaryotic cells.
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Its product binds to DNA, acting as a transcription factor that is critical for testis production. Scientists studying sex reversal, a difference between the chromosomal sex and the phenotypic sex, confirmed the importance of SRY.
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The variation requires a cis-acting hix element at the borders of the invertable element and a trans-acting hin gene, which encodes a site-specific recombinase, called an invertase.
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Enhancer: An enhancer is a cis-acting nucleotide sequence to which transcription factor(s) bind, and which increases the transcription of a gene.
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Vitamin. Chemical substances required in trace concentrations acting as a cofactor with enzymes in catalyzing biochemical reactions
Viviparous (development). Refers to development of an organism through the juvenile stage within a parent ...
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cell vacuole
a membrane-bound sac that is found in many cells, normally acting as a storage organ of various types. A large central vacuole is a particular feature of many plant cells, where it can occupy 80-90% of the total cell volume.
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RNA primers - primers used to synthesize DNA strands by acting as a template
RNA splicing - process in which intron sequences are excised from RNA molecules in the nucleus during formation of messenger RNA ...
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acting on many or all genes in all tissues), or tissue-specific (i.e. present only in a particular cell type, and activating the genes restricted to that cell type).
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CIS - As used in molecular biology, an interaction between two sites which are located within the same molecule. However, a cis-acting protein can either be one which acts only on the molecule of DNA from which it was expressed, ...
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He showed that, under stress, some bacteria can induce a mutation to fix a "broken" gene -- and not produce (many) other mutations. In other words, the stress was not acting as generalized mutagen.
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