Definitions for G protein
g protein

WiktionaryRate this definition:0.0 / 0 votes

1. G proteinnoun

   Any of a class of proteins, found in cell membranes, that pass signals between hormone receptors and effector enzymes

2. Etymology: *guanine nucleotide binding protein

WikipediaRate this definition:0.0 / 0 votes

1. G protein

   G proteins, also known as guanine nucleotide-binding proteins, are a family of proteins that act as molecular switches inside cells, and are involved in transmitting signals from a variety of stimuli outside a cell to its interior. Their activity is regulated by factors that control their ability to bind to and hydrolyze guanosine triphosphate (GTP) to guanosine diphosphate (GDP). When they are bound to GTP, they are 'on', and, when they are bound to GDP, they are 'off'. G proteins belong to the larger group of enzymes called GTPases. There are two classes of G proteins. The first function as monomeric small GTPases (small G-proteins), while the second function as heterotrimeric G protein complexes. The latter class of complexes is made up of alpha (α), beta (β) and gamma (γ) subunits. In addition, the beta and gamma subunits can form a stable dimeric complex referred to as the beta-gamma complex .Heterotrimeric G proteins located within the cell are activated by G protein-coupled receptors (GPCRs) that span the cell membrane. Signaling molecules bind to a domain of the GPCR located outside the cell, and an intracellular GPCR domain then in turn activates a particular G protein. Some active-state GPCRs have also been shown to be "pre-coupled" with G proteins, whereas in other cases a collision coupling mechanism is thought to occur. The G protein activates a cascade of further signaling events that finally results in a change in cell function. G protein-coupled receptor and G proteins working together transmit signals from many hormones, neurotransmitters, and other signaling factors. G proteins regulate metabolic enzymes, ion channels, transporter proteins, and other parts of the cell machinery, controlling transcription, motility, contractility, and secretion, which in turn regulate diverse systemic functions such as embryonic development, learning and memory, and homeostasis.

WikidataRate this definition:0.0 / 0 votes

1. G protein

   G proteins, also known as guanosine nucleotide-binding proteins, are a family of proteins involved in transmitting signals from a variety of different stimuli outside a cell into the inside of the cell. G proteins function as molecular switches. Their activity is regulated by factors that control their ability to bind to and hydrolyze guanosine triphosphate to guanosine diphosphate. When they bind GTP, they are 'on', and, when they bind GDP, they are 'off'. G proteins belong to the larger group of enzymes called GTPases. There are two classes of G proteins. The first function as monomeric small GTPases while the second form and function as heterotrimeric G protein complexes. The latter class of complexes are made up of alpha, beta and gamma subunits. In addition, the beta and gamma subunits can form a stable dimeric complex referred to as the beta-gamma complex. G proteins located within the cell are activated by G protein-coupled receptors that span the cell membrane. Signaling molecules bind to a domain of the GPCR located outside the cell. An intracellular GPCR domain in turn activates a G protein. The G protein activates a cascade of further signaling events that finally results in a change in cell function. G protein-coupled receptor and G proteins working together transmit signals from many hormones, neurotransmitters, and other signaling factors. G proteins regulate metabolic enzymes, ion channels, transporter, and other parts of the cell machinery, controlling transcription, motility, contractility, and secretion, which in turn regulate diverse systemic functions such as embryonic development, learning and memory, and homeostasis.

How to pronounce G protein?

1. Alex

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   Mark

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   Daniel

   British

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   Australian

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How to say G protein in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of G protein in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of G protein in Pythagorean Numerology is: 5

Examples of G protein in a Sentence

1. Rajani Katta:

   Although this study didn't address whey protein supplements, those have been linked to severe acne in some cases, and I would recommend stopping those, i always emphasize, though, that any dietary change would be used in addition to medical therapy and not in place of medical therapy.

2. Amira Kassis:

   The carbohydrates are given more at high altitude because they are an efficient and quick source of energy, we use the lower altitude as a recovery phase – this is where we give protein to ensure that the muscles recover.

3. Lakiea Wright:

   If you're allergic to only that specific protein in the male dog, you may be able to tolerate a female or a neutered dog.

4. Tanya Altmann:

   I think there is good research that shows that nutrition is critical for a child's brain and for concentration and learning at school. So whether breakfast is provided at home or at school, as a pediatrician, I do see a difference in kids that get good nutrition in the morning, such as protein, fresh fruit and enough calories, and how they function during the day at school, while adults may be able to focus and concentrate better with poorer nutrition, with kids, they cannot necessarily control that, and they might be more distracted and less able to sit and learn if their basic needs such as sleep and nutrition aren't getting met.

5. Allie Matarasso:

   A serving of protein should be approximately the size of the palm of your hand and starch should be about the size of your clenched fist.

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/G_Protein
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/G_Protein
3. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=G protein