Définitions et usages de : Adenosine_monophosphate - Dictionnaire de anglais sensagent

Définition

adenosine monophosphate (n.)

1.a nucleotide found in muscle cells and important in metabolism; reversibly convertible to ADP and ATP

Adenosine Monophosphate (n.)

1.(MeSH)Adenylic acid. Adenine nucleotide containing one phosphate group esterified to the sugar moiety in the 2'-, 3'-, or 5'-position.

Publicité ▼

Adenosine monophosphate


IUPAC name 5'-Adenylic acid
Identifiers
CAS number	61-19-8^Y
ChemSpider	5858^Y
UNII	415SHH325A^Y
DrugBank	DB00131
KEGG	C00020^Y
MeSH	Adenosine+monophosphate
ChEBI	CHEBI:16027^Y
ChEMBL	CHEMBL752^Y
IUPHAR ligand	2455
Jmol-3D images	Image 1 Image 2
SMILES O=P(O)(O)OC[C@H]3O[C@@H](n2cnc1c(ncnc12)N)[C@H](O)[C@@H]3O c1nc(c2c(n1)n(cn2)[C@H]3[C@@H]([C@@H]([C@H](O3)COP(=O)(O)O)O)O)N
InChI InChI=1S/C10H14N5O7P/c11-8-5-9(13-2-12-8)15(3-14-5)10-7(17)6(16)4(22-10)1-21-23(18,19)20/h2-4,6-7,10,16-17H,1H2,(H2,11,12,13)(H2,18,19,20)/t4-,6-,7-,10-/m1/s1^Y Key: UDMBCSSLTHHNCD-KQYNXXCUSA-N^Y InChI=1/C10H14N5O7P/c11-8-5-9(13-2-12-8)15(3-14-5)10-7(17)6(16)4(22-10)1-21-23(18,19)20/h2-4,6-7,10,16-17H,1H2,(H2,11,12,13)(H2,18,19,20)/t4-,6-,7-,10-/m1/s1 Key: UDMBCSSLTHHNCD-KQYNXXCUBP
Properties
Molecular formula	C₁₀H₁₄N₅O₇P
Molar mass	347.22 g/mol
Acidity (pK_a)	0.9, 3.8, 6.1
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Adenosine monophosphate (AMP), also known as 5'-adenylic acid, is a nucleotide that is used as a monomer in RNA. It is an ester of phosphoric acid and the nucleoside adenosine. AMP consists of a phosphate group, the sugar ribose, and the nucleobase adenine. As a substituent it takes the form of the prefix adenylyl-.

1 Production and degradation
2 cAMP
3 See also
4 References
5 External links

Production and degradation

AMP can be produced during ATP synthesis by the enzyme adenylate kinase by combining two ADP molecules:

2 ADP → ATP + AMP

Or AMP may be produced by the hydrolysis of one high energy phosphate bond of ADP:

ADP → AMP + P_i

AMP can also be formed by hydrolysis of ATP into AMP and pyrophosphate:

ATP → AMP + PP_i

When RNA is broken down by living systems, nucleoside monophosphates, including adenosine monophosphate, are formed.

AMP can be regenerated to ATP as follows:

AMP + ATP → 2 ADP (adenylate kinase in the opposite direction)

ADP + P_i → ATP (this step is most often performed in aerobes by the ATP synthase during oxidative phosphorylation)

AMP can be converted into IMP by the enzyme myoadenylate deaminase, freeing an ammonia group.

In a catabolic pathway, adenosine monophosphate can be converted to uric acid, which is excreted from the body.

cAMP

AMP can also exist as a cyclic structure known as cyclic AMP (or cAMP). Within certain cells the enzyme adenylate cyclase makes cAMP from ATP, and typically this reaction is regulated by hormones such as adrenaline or glucagon. cAMP plays an important role in intracellular signaling.

References

External links

Ming D, Ninomiya Y, Margolskee RF (1999). "Blocking taste receptor activation of gustducin inhibits gustatory responses to bitter compounds". Proc. Natl. Acad. Sci. USA 96 (17): 9903–9908. DOI:10.1073/pnas.96.17.9903. PMC 22308. PMID 10449792. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=22308.

Nucleic acid constituents

Nucleobase

Purine (Adenine, Guanine, Purine analogue) · Pyrimidine (Uracil, Thymine, Cytosine, Pyrimidine analogue)

Nucleoside

Ribonucleoside	Adenosine · Guanosine · 5-Methyluridine · Uridine · Cytidine

Deoxyribonucleoside	Deoxyadenosine · Deoxyguanosine · Thymidine · Deoxyuridine · Deoxycytidine