GTP

A GTP-binding protein that relays signals from a plasma-membrane signal receptor, known as a G-protein linked receptor, to other signal-transduction proteins inside the cell.

The GTP that is formed by GDP-forming succinyl-CoA synthetase may be utilized by nucleoside-diphosphate kinase to form ATP (the catalyzed reaction is GTP + ADP -> GDP + ATP).[1]
[edit] A simplified view of the process ...

The process after Citric Acid is essentially removing carbon dioxide, getting out energy in the form of ATP, GTP, NADH and FADH2, and lastly regenerating the cycle.

Tubulin binds GTP and assembles onto the (+) ends of microtubules in the GTP-bound state. Once assembled into microtubules, it hydrolyzes GTP into GDP.

Nucleotide triphosphates (in the forms ATP, GTP, CTP and TTP) are assembled according to the semi-conservative model. Other details of DNA replication are consistent with what we know for prokaryotes.

When activated, the Gα subunit of the G protein swaps GDP for GTP. However, the Gα subunit is a GTPase and quickly converts GTP back to GDP restoring the inactive state of the receptor. [Link to a discussion.] ...

In the active state, the α protein exchanges GDP for GTP and dissociates from the βã subunits. The GTP-bound α subunit propagates the signal.

Cap: A methylated guanine residue (GTP), which is added to the 5' end of eukaryotic mRNAs in a post-transcriptional reaction. It protects the mRNA against 5'-exonuclease, stabilises the mRNA and enhances its translation.

G-protein is activated by binding GTP and causing adenylyl cyclase to produce cAMP.
B.
The second messenger, cAMP, activates protein kinase A which inhibits glycogen synthetase blocking glycogen synthesis.

The nucleotides used for synthesis are ATP, GTP, CTP and TTP. Each of these DNA nucleotides has three phosphate groups. Two of the phosphates will be removed when the nucleotide is attached to the growing chain of new DNA.
5' to 3' ...

Cloning of opb has revealed that it encodes RAB23, a member of a large family of small GTP-activated proteins associated with many dynamic aspects of membrane trafficking (Eggenschwiler et al. 2001).

G proteins are made up of three subunits, and they're called G proteins because they bind another molecule called GTP (guanosine triphosphate). And once the receptor activates the G protein, then it goes on and has other effects in the cell.

deoxynucleotides - components of DNA, containing the phosphate, sugar and organic base; when in the triphosphate form, they are the precursors required by DNA polymerase for DNA synthesis (i.e., ATP, CTP, GTP, TTP).

See also: Trans, Protein, Cells, Molecule, Cell