Page last updated: 2024-10-24

peptide secretion

Definition

Target type: biologicalprocess

The controlled release of a peptide from a cell or a tissue. [GOC:add]

Peptide secretion is a complex biological process that involves the movement of newly synthesized peptides from their site of synthesis within the cell to the extracellular space. This process is essential for a wide range of cellular functions, including signaling, communication, and defense. Here is a detailed description of the major steps involved in peptide secretion:

1. **Synthesis and Folding:** Peptide synthesis begins in the ribosomes, where the genetic code is translated into a linear chain of amino acids. As the peptide chain emerges from the ribosome, it starts to fold into its unique three-dimensional structure, guided by interactions between amino acids. This folding process is crucial for the peptide's function and stability.

2. **Translocation to the ER:** Most secreted peptides are synthesized on ribosomes that are associated with the endoplasmic reticulum (ER), a network of interconnected membranes that extends throughout the cytoplasm. As the peptide is being synthesized, it is simultaneously translocated into the lumen of the ER, the space enclosed by the ER membrane. This translocation is facilitated by a protein complex called the translocon.

3. **Protein Folding and Modification:** Within the ER lumen, newly synthesized peptides undergo further folding and modification. These modifications include disulfide bond formation, glycosylation, and the addition of other post-translational modifications. These modifications are essential for the peptide's proper folding, stability, and function.

4. **Quality Control:** The ER also serves as a quality control checkpoint for secreted peptides. If a peptide fails to fold correctly or is otherwise misfolded, it is recognized by chaperone proteins and targeted for degradation. This ensures that only properly folded and functional peptides are secreted from the cell.

5. **Transport to the Golgi:** After folding and modification, the peptides are transported from the ER to the Golgi apparatus, another organelle in the cell. The Golgi apparatus is a series of flattened membrane-bound sacs called cisternae. As peptides move through the Golgi, they undergo further modification and sorting.

6. **Packaging into Vesicles:** In the Golgi, secreted peptides are packaged into transport vesicles, small membrane-bound spheres that bud off from the Golgi. These vesicles contain various enzymes and proteins that are necessary for the final stages of peptide secretion.

7. **Exocytosis:** The transport vesicles then move to the cell surface, where they fuse with the plasma membrane and release their contents into the extracellular space. This process, known as exocytosis, is the final step in peptide secretion.

8. **Targeting and Delivery:** Once released into the extracellular space, secreted peptides can travel to their target cells or tissues. Some peptides act as signaling molecules, binding to receptors on the surface of target cells to elicit specific responses. Others act as structural components, contributing to the formation of extracellular matrices or other structures.

The process of peptide secretion is highly regulated, ensuring that only properly folded and functional peptides are released from the cell. This regulation is crucial for maintaining cellular homeostasis and normal physiological function.'
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Proteins (1)

ProteinDefinitionTaxonomy
Transient receptor potential cation channel subfamily V member 1A transient receptor potential cation channel TRPV1 that is encoded in the genome of human. [PRO:CNA, UniProtKB:Q8NER1]Homo sapiens (human)

Compounds (68)

CompoundDefinitionClassesRoles
2-aminoethoxydiphenyl borate2-aminoethoxydiphenyl borate: is a novel membrane-penetrable modulator and transient receptor potential channel blocker; structure in first source; do not confuse with 2-APB cpd

2-aminoethoxydiphenylborane : An organoboron compound that is diphenylborane in which the borane hydrogen is replaced by a 2-aminoethoxy group.
organoboron compound;
primary amino compound
calcium channel blocker;
IP3 receptor antagonist;
potassium channel opener
benzyl isothiocyanatebenzyl isothiocyanate: inhibits carcinogen-induced neoplasia; structure in Negwer, 5th ed, #715; also promotes urinary bladder carcinomabenzenes;
isothiocyanate
antibacterial drug
cannabinolCannabinol: A physiologically inactive constituent of Cannabis sativa L.dibenzopyran
palmidrolpalmidrol: a cannabinoid receptor-inactive eCB-related molecule used as prophylactic in helping to prevent respiratory viral infection

palmitoyl ethanolamide : An N-(long-chain-acyl)ethanolamine that is the ethanolamide of palmitic (hexadecanoic) acid.
endocannabinoid;
N-(long-chain-acyl)ethanolamine;
N-(saturated fatty acyl)ethanolamine
anti-inflammatory drug;
anticonvulsant;
antihypertensive agent;
neuroprotective agent
allyl isothiocyanateallyl isothiocyanate : An isothiocyanate with the formula CH2=CHCH2N=C=S. A colorless oil with boiling point 152degreeC, it is responsible for the pungent taste of mustard, horseradish, and wasabi.

allyl isothiocyanate: used in the manufacture of flavors, war gases; medical use as a counterirritant; structure
alkenyl isothiocyanate;
isothiocyanate
antimicrobial agent;
antineoplastic agent;
apoptosis inducer;
lachrymator;
metabolite
citronellolcitronellol : A monoterpenoid that is oct-6-ene substituted by a hydroxy group at position 1 and methyl groups at positions 3 and 7.

citronellol: alcohol form of citronellal; found in rose oil; RN given refers to parent cpd without isomeric designation; structure

insect repellent : An insecticide that acts as a repellent to insects.
monoterpenoidplant metabolite
citronellyl acetatecitronellol acetate : A monoterpenoid that is the acetate ester of citronellol. It has been isolated from Citrus hystrix.

citronellyl acetate: RN given refers to cpd without isomeric designation
acetate ester;
monoterpenoid
plant metabolite
phenethyl isothiocyanatephenethyl isothiocyanate : An isothiocyanate having a phenethyl group attached to the nitrogen. It is a naturally occurring compound found in some cruciferous vegetables (e.g. watercress) and is known to possess anticancer properties.

phenethyl isothiocyanate: a dietary liver aldehyde dehydrogenase inhibitor; promotes urinary bladder carcinoma
isothiocyanateantineoplastic agent;
EC 1.2.1.3 [aldehyde dehydrogenase (NAD(+))] inhibitor;
metabolite
cannabichromene1-benzopyran
allicinbotanical anti-fungal agent;
sulfoxide
antibacterial agent
voacaminealkaloid ester;
methyl ester;
monoterpenoid indole alkaloid;
organic heteropentacyclic compound;
tertiary amino compound
angiogenesis inhibitor;
antineoplastic agent;
plant metabolite
(6ar-trans)-isomer of tetrahydrocannabivarin 9
cp-55,940
1,1'-biphenyl-4-yl-boronic acid
4-hydroxybenzyl isothiocyanate4-hydroxybenzyl isothiocyanate: found in white mustard; structure in first sourcephenols
Tetrahydropiperinebenzodioxoles
geraniol3,7-dimethylocta-2,6-dien-1-ol;
monoterpenoid;
primary alcohol
allergen;
fragrance;
plant metabolite;
volatile oil component
piperinepiperine : A N-acylpiperidine that is piperidine substituted by a (1E,3E)-1-(1,3-benzodioxol-5-yl)-5-oxopenta-1,3-dien-5-yl group at the nitrogen atom. It is an alkaloid isolated from the plant Piper nigrum.benzodioxoles;
N-acylpiperidine;
piperidine alkaloid;
tertiary carboxamide
food component;
human blood serum metabolite;
NF-kappaB inhibitor;
plant metabolite
ilepcimideilepcimide: structure given in first source; RN given refers to compound with no isomeric designationbenzodioxoles
nerolnerol : The (2Z)-stereoisomer of 3,7-dimethylocta-2,6-dien-1-ol. It has been isolated from the essential oils from plants like lemon grass.3,7-dimethylocta-2,6-dien-1-olfragrance;
plant metabolite;
volatile oil component
cannabidiolcannabidiol : An cannabinoid that is cyclohexene which is substituted by a methyl group at position 1, a 2,6-dihydroxy-4-pentylphenyl group at position 3, and a prop-1-en-2-yl group at position 4.

Cannabidiol: Compound isolated from Cannabis sativa extract.
olefinic compound;
phytocannabinoid;
resorcinols
antimicrobial agent;
plant metabolite
sb 366791N-(3-methoxyphenyl)-4-chlorocinnamanilide: a TRPV1 antagonist; structure in first source
(e)-3-(4-t-butylphenyl)-n-(2,3-dihydrobenzo(b)(1,4)dioxin-6-yl)acrylamide3-(4-t-butylphenyl)-N-(2,3-dihydrobenzo(b)(1,4)dioxin-6-yl)acrylamide: a vanilloid receptor 1 antagonist and antihyperalgesic agent; structure in first source
hc 0300312-(1,3-dimethyl-2,6-dioxo-1,2,3,6-tetrahydro-7H-purin-7-yl)-N-(4-isopropylphenyl)acetamide: a TRPA1 channel blocker
zucapsaicinmethoxybenzenes;
phenols
capsaicinALGRX-4975: an injectable capsaicin (TRPV1 receptor agonist) formulation for longlasting pain relief

capsaicinoid : A family of aromatic fatty amides produced as secondary metabolites by chilli peppers.
capsaicinoidnon-narcotic analgesic;
TRPV1 agonist;
voltage-gated sodium channel blocker
geranyl acetategeranyl acetate : A monoterpenoid that is the acetate ester derivative of geraniol.

geranyl acetate: constituted about 90% of the palmarosa oil
acetate ester;
monoterpenoid
plant metabolite
capsazepinecapsazepine : A benzazepine that is 2,3,4,5-tetrahydro-1H-2-benzazepine which is substituted by hydroxy groups at positions 7 and 8 and on the nitrogen atom by a 2-(p-chlorophenyl)ethylaminothiocarbonyl group. A synthetic analogue of capsaicin, it was the first reported capsaicin receptor antagonist.

capsazepine: modified capsaicin molecule; a capsaicin receptor antagonist
benzazepine;
catechols;
monochlorobenzenes;
thioureas
capsaicin receptor antagonist
phorbol 12-phenylacetate 13-acetate 20-homovanillatephorbol 12-phenylacetate 13-acetate 20-homovanillate: behavior contrasts with resiniferatoxin and capsaicin in the lack of cooperativity in binding vanilloid (capsaicin) receptor
6-iodonordihydrocapsaicin6-iodonordihydrocapsaicin: a TRPV1 antagonistmethoxybenzenes;
phenols
pinosylvinpinosylvin: phytoalexin found in pine and eucalyptuspinosylvin
Pinosylvin methyl etherstilbenoid
pterostilbenediether;
methoxybenzenes;
stilbenol
anti-inflammatory agent;
antineoplastic agent;
antioxidant;
apoptosis inducer;
hypoglycemic agent;
neuroprotective agent;
neurotransmitter;
plant metabolite;
radical scavenger
shogaolshogaol: from ginger, ZINGIBER OFFICINALE; less mutagenic than GINGEROL; structure given in first sourceenone;
monomethoxybenzene;
phenols
anandamideanandamide : An N-acylethanolamine 20:4 resulting from the formal condensation of carboxy group of arachidonic acid with the amino group of ethanolamine.endocannabinoid;
N-acylethanolamine 20:4
human blood serum metabolite;
neurotransmitter;
vasodilator agent
arachidonyl dopaminearachidonyl dopamine: a ligand for the vanilloid receptor VR1catechols;
fatty amide;
N-(fatty acyl)-dopamine;
secondary carboxamide
4,4'-dihydroxystilbenestilbene-4,4'-diol
linoleoyl ethanolamidelinoleoyl ethanolamide : An N-acylethanolamine 18:2 that is the ethanolamide of linoleic acid.

linoleoyl ethanolamide: RN given for (Z,Z)-isomer
N-acylethanolamine 18:2EC 3.5.1.99 (fatty acid amide hydrolase) inhibitor
n-oleoylethanolamineN-oleoylethanolamine: ceramidase inhibitor

oleoyl ethanolamide : An N-(long-chain-acyl)ethanolamine that is the ethanolamide of oleic acid. The monounsaturated analogue of the endocannabinoid anandamide.
endocannabinoid;
N-(long-chain-acyl)ethanolamine;
N-acylethanolamine 18:1
EC 3.5.1.23 (ceramidase) inhibitor;
geroprotector;
PPARalpha agonist
4-hydroxystilbene4-hydroxystilbene: RN given refers to cpd without isomeric designation

stilben-4-ol : A phenol having the structure of stilbene with a hydroxy function at C-4 of one of the phenyl rings; the stereochemistry across the alkene bond is not specified.
stilben-4-ol
olvanilmethoxybenzenes;
phenols
cannabigerolcannabigerol : A member of the class of resorcinols that is resorcinol which is substituted by a (2E)-3,7-dimethylocta-2,6-dien-1-yl group at position 2 and by a pentyl group at position 5. It is a natural product found in Cannabis sativa and Helichrysum species.

cannabigerol: RN given refers to (E)-isomer; structure given in first source
phytocannabinoid;
resorcinols
anti-inflammatory agent;
antibacterial agent;
antioxidant;
appetite enhancer;
cannabinoid receptor agonist;
neuroprotective agent;
plant metabolite
3,5-dimethoxy-trans-stilbene3,5-dimethoxystilbene: structure in first sourcestilbenoid
albaconolalbaconol: from the mushroom Albatrellus; structure in first source
Piperaninebenzodioxoles
piperlongumininepiperlonguminine: from Piper longum; structure in first sourcebenzodioxoles
3,4',5-trimethoxystilbene3,4',5-trimethoxystilbene: structure in first source
catharanthinealkaloid ester;
bridged compound;
methyl ester;
monoterpenoid indole alkaloid;
organic heteropentacyclic compound;
tertiary amino compound
iodoresiniferatoxiniodoresiniferatoxin: a vanilloid receptor 1 antagonist
arvanilarvanil: structure in first sourcemethoxybenzenes;
phenols
am 404anilide
1-isoquinolin-5-yl-3-(4-trifluoromethyl-benzyl)-urea1-isoquinolin-5-yl-3-(4-trifluoromethyl-benzyl)-urea: structure in first source
sb 705498SB 705498: structure in first source
n-(4-tert-butylphenyl)-4-(3-chloropyridin-2-yl)tetrahydropyrazine-1(2h)-carboxamideN-(4-tert-butylphenyl)-4-(3-chloropyridin-2-yl)tetrahydropyrazine-1(2H)-carboxamide: a vanilloid receptor 1 antagonist and analgesic; structure in first sourcepiperazines;
pyridines
arachidonoylserotoninarachidonoylserotonin: an NSAID with antinociceptive activity; fatty acid amide hydrolase inhibitor; structure in first source

N-arachidonoylserotonin : An N-acylserotonin obtained by formal condensation of the carboxy group of arachidonic acid with the primary amino group of serotonin.
N-acylserotonin;
phenols
anti-inflammatory agent;
anticonvulsant;
antioxidant;
capsaicin receptor antagonist;
EC 3.5.1.99 (fatty acid amide hydrolase) inhibitor;
human metabolite;
signalling molecule
jyl 1421JYL 1421: a vanilloid receptor antagonist; structure in first source
abt 102ABT 102: a TRPV1 antagonist; structure in first source
jnj 17203212
a 7841681-(3-(trifluoromethyl)pyridin-2-yl)-N-(4-(trifluoromethylsulfonyl)phenyl)-1,2,3,6-tetrahydropyridine-4-carboxamide: a TRPV1 antagonist
ly2183240LY2183240: structure in first sourcebiphenyls
methylphenidateN-phenyl-4-(quinolin-2-ylmethyl)piperazine-1-carboxamide: a fatty acid amide hydrolase inhibitor; structure in first source
cannabidivarincannabidivarin: from Cannabis sativamonoterpenoid
amg 517
a 803467A 803467: an Nav1.8 sodium channel blocker; structure in first source
mavatrepmavatrep: a transient receptor potential vanilloid 1 antagonist; structure in first source
am 6701
voacristinevoacristine: indole alkaloid from leaves of Ervatamia coronaria; RN given for 20(S)-isomer; structure given in first source
abt 116ABT 116: a TRPV1 antagonist with analgesic activity; structure in first source