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Galanin (1-30) (human)

Endogenous galanin receptor agonist CAS# 119418-04-1

Galanin (1-30) (human)

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Chemical structure

Galanin (1-30) (human)

3D structure

Chemical Properties of Galanin (1-30) (human)

Cas No. 119418-04-1 SDF Download SDF
PubChem ID 16133823 Appearance Powder
Formula C139H210N42O43 M.Wt 3157.41
Type of Compound N/A Storage Desiccate at -20°C
Solubility Soluble to 0.50 mg/ml in water
Sequence GWTLNSAGYLLGPHAVGNHRSFSDKNGLTS
SMILES CC(C)CC(C(=O)NC(C(C)O)C(=O)NC(CO)C(=O)O)NC(=O)CNC(=O)C(CC(=O)N)NC(=O)C(CCCCN)NC(=O)C(CC(=O)O)NC(=O)C(CO)NC(=O)C(CC1=CC=CC=C1)NC(=O)C(CO)NC(=O)C(CCCNC(=N)N)NC(=O)C(CC2=CNC=N2)NC(=O)C(CC(=O)N)NC(=O)CNC(=O)C(C(C)C)NC(=O)C(C)NC(=O)C(CC3=CNC=N3)NC(=O)C4CCCN4C(=O)CNC(=O)C(CC(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC5=CC=C(C=C5)O)NC(=O)CNC(=O)C(C)NC(=O)C(CO)NC(=O)C(CC(=O)N)NC(=O)C(CC(C)C)NC(=O)C(C(C)O)NC(=O)C(CC6=CNC7=CC=CC=C76)NC(=O)CN
Standard InChIKey CBSXZYWGVAQSHI-RUKUCZSXSA-N
Standard InChI InChI=1S/C139H210N42O43/c1-65(2)38-84(165-121(206)86(40-67(5)6)166-123(208)88(43-75-31-33-79(188)34-32-75)161-106(193)55-151-114(199)70(11)157-131(216)97(59-182)175-127(212)95(49-104(144)191)170-122(207)87(41-68(7)8)173-136(221)112(72(13)186)180-130(215)90(159-105(192)51-141)44-76-52-150-81-27-19-18-26-80(76)81)116(201)154-58-109(196)181-37-23-30-101(181)134(219)172-91(45-77-53-147-63-155-77)120(205)158-71(12)115(200)178-111(69(9)10)135(220)153-57-108(195)162-94(48-103(143)190)126(211)168-92(46-78-54-148-64-156-78)125(210)164-83(29-22-36-149-139(145)146)119(204)174-98(60-183)132(217)167-89(42-74-24-16-15-17-25-74)124(209)176-99(61-184)133(218)171-96(50-110(197)198)128(213)163-82(28-20-21-35-140)118(203)169-93(47-102(142)189)117(202)152-56-107(194)160-85(39-66(3)4)129(214)179-113(73(14)187)137(222)177-100(62-185)138(223)224/h15-19,24-27,31-34,52-54,63-73,82-101,111-113,150,182-188H,20-23,28-30,35-51,55-62,140-141H2,1-14H3,(H2,142,189)(H2,143,190)(H2,144,191)(H,147,155)(H,148,156)(H,151,199)(H,152,202)(H,153,220)(H,154,201)(H,157,216)(H,158,205)(H,159,192)(H,160,194)(H,161,193)(H,162,195)(H,163,213)(H,164,210)(H,165,206)(H,166,208)(H,167,217)(H,168,211)(H,169,203)(H,170,207)(H,171,218)(H,172,219)(H,173,221)(H,174,204)(H,175,212)(H,176,209)(H,177,222)(H,178,200)(H,179,214)(H,180,215)(H,197,198)(H,223,224)(H4,145,146,149)/t70-,71-,72+,73+,82-,83-,84-,85-,86-,87-,88-,89-,90-,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,111-,112-,113-/m0/s1
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of Galanin (1-30) (human)

DescriptionEndogenous peptide with multiple endocrine, metabolic and behavioral effects. Has been shown to have an action on intestinal smooth muscle, insulin and somatostatin release, and synaptic neurotransmission.

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References on Galanin (1-30) (human)

Mechanisms of galanin-induced contraction in the rat myometrium.[Pubmed:9756377]

Br J Pharmacol. 1998 Aug;124(8):1623-32.

A neuropeptide, galanin, regulates the reproductive process and directly induces myometrial contraction. The aim of this study was to determine the mechanism of galanin-induced myometrial contraction. For this purpose, we simultaneously measured intracellular Ca2+ concentration ([Ca2+]i) and tension using fura-PE3-fluorometry and the rat longitudinal myometrium. The effect of galanin on the Ca2+ sensitivity of the contractile apparatus was examined in beta-escin permeabilized strips. The expression of galanin and the galanin receptors mRNAs in the rat myometrium were determined by reverse transcription polymerase chain reaction (RT-PCR). Galanin (10-300 nM) induced phasic contraction with or without oscillation in the pregnant rat myometrium in a concentration-dependent manner. The maximal response was obtained at 100 nM. There was no significant difference either in the maximal responses or EC50 values for galanin-induced myometrial contractions among myometriums from non-pregnant and pregnant (day 4, day 11, day 20, day 22) rats. In the day 20 and 22 pregnant myometriums, assigning the levels of [Ca2+]i and tension at 40 mM K+-depolarization to be 100%, galanin increased the [Ca2+]i and tension to 126.9+/-2.9% and 116.3+/-2.7%, respectively. Diltiazem (10 microM) inhibited the galanin-induced elevation of [Ca2+]i and tension to 71.9+/-2.4% and 16.2+/-0.7%, respectively. Ni2+, by itself, decreased the basal [Ca2+]i to -50.2+/-3.9% without affecting resting tension. After Ni2+ treatment, galanin-induced increases in [Ca2+]i and tension were -19.6+/-3.4% and 0.9+/-0.1%, respectively. In myometrium treated with diltiazem, no oscillation in [Ca2+]i and tension was observed. In Ca2+-free solution with 0.1 mM EGTA, galanin increased [Ca2+]i from -40.2+/-2.7% to -18.0+/-2.6% and induced transient contraction (3.6+/-0.8%). In beta-escin permeabilized myometrium, galanin enhanced the contraction induced by 0.3 microM Ca2+ in the presence of GTP. In the presence of GDPbetaS (1 mM) instead of GTP, galanin failed to increase the Ca2+ sensitivity of the contractile apparatus. RT-PCR revealed that galanin mRNA was hardly expressed in the non-pregnant rat myometrium and increased to reach a maximal level at mid pregnancy (day 11), but decreased to the same level as in the non-pregnant myometrium at term (day 22). Type 2 galanin receptor (GALR2) mRNA was found to be expressed in the rat myometrium whereas type 1 galanin receptor (GALR1) mRNA expression was not detected. In conclusion, galanin induces contraction of the rat myometrium by increasing [Ca2+]i as well as by increasing Ca2+ sensitivity of the contractile apparatus. Galanin-induced increases in [Ca2+]i are caused by both intracellular Ca2+ release and Ca2+ influx from extracellular space. The responsiveness of the rat myometrium to galanin does not change during pregnancy. The galanin mRNA is expressed in the rat myometrium and it is upregulated during mid-pregnancy. Rat myometrium expresses GALR2 but not GALR1 mRNA. By changing mRNA expression in the myometrium during pregnancy, galanin may act as a paracrine or autocrine mediator in the regulation of myometrial contractility.

Hypothalamic galanin: control by signals of fat metabolism.[Pubmed:9729239]

Brain Res. 1998 Aug 31;804(1):7-20.

The peptide, galanin (GAL), is known to stimulate eating behavior, reduce energy expenditure and affect the release of metabolic hormones. Further, the activity of this peptide in the hypothalamus is modulated, in turn, by these hormones as well as by the ingestion of nutrients. The focus of this investigation is on signals related to nutrient metabolism that may also affect GAL production and, through these neurochemical events, control the ingestion of specific nutrients. Three experiments were performed in normal-weight male, Sprague-Dawley rats. In Experiment 1, the impact of food deprivation (24 and 48 h) was examined. Experiment 2 tested the effects of the compound, 2-deoxy-D-glucose (2-DG, 200 and 400 mg/kg), which blocks glucose utilization, whereas Experiment 3 studied mercaptoacetate (MA, 200 and 600 micromol/kg), which blocks fatty acid oxidation. Eating behavior was examined in some rats, whereas hypothalamic GAL activity was measured in others using radioimmunoassay, immunohistochemistry and in situ hybridization. Both food deprivation and MA (600 micromol/kg), but not 2-DG, affected GAL in the hypothalamus, in one specific area. This is the anterior parvocellular region of the paraventricular nucleus (aPVN), which has a dense concentration of GAL-containing neurons and terminals. GAL gene expression and peptide immunoreactivity in this area is enhanced by food deprivation; in contrast, it is reduced by injection of MA. Other hypothalamic sites with dense concentrations of GAL-containing neurons or fibers are unaffected by food deprivation or MA, and the antimetabolite 2-DG has no impact on GAL in any area. Behavioral measurements indicate that these shifts in GAL activity are accompanied by specific changes in eating behavior. Food deprivation which enhances aPVN GAL produces a marked increase in fat ingestion, whereas MA which reduces aPVN GAL causes a specific reduction in fat ingestion along with a stimulation of protein intake. In contrast, 2-DG preferentially enhances ingestion of carbohydrate. These findings suggest a possible relationship between GAL activity in the aPVN and the metabolic and behavioral processes of fat metabolism and ingestion.

Isolation and primary structure of pituitary human galanin, a 30-residue nonamidated neuropeptide.[Pubmed:1722333]

Proc Natl Acad Sci U S A. 1991 Dec 15;88(24):11435-9.

Galanin (Gal), a 29-amino acid C-terminally amidated neuropeptide, is widely distributed throughout the central and peripheral nervous system. The primary structures of rat and bovine Gals were derived from the cDNA sequences of their precursors. To elucidate the structure of human Gal (hGal), we extracted 280 postmortem pituitaries in trifluoroacetic acid and purified hGal binding activity, by three successive HPLC steps, to homogeneity based on a radioreceptor assay. The primary structure of hGal was determined by automatic Edman degradation to be Gly-Trp-Thr-Leu-Asn-Ser-Ala-Gly-Tyr-Leu-Leu- Gly-Pro-His-Ala-Val-Gly-Asn-His-Arg-Ser-Phe-Ser-Asp-Lys-Asn-Gly-Leu-Thr- Ser-COOH. The structure was confirmed by plasma desorption time-of-flight mass spectrometry, revealing a mass of 3156.1. Compared to the 29-residue porcine, rat, and bovine Gals, hGal uniquely comprises 30 amino acids possessing an additional nonamidated serine residue as C terminus. The nonamidated carboxylic group at the C terminus was proven by synthesis of amidated and nonamidated hGal and by mass spectrometry after selective methylation of all free carboxylic groups. Synthetic hGal possesses full biological activity on isolated rat fundus muscle strips.

Description

Galanin (1-30), human is a 30-amino acid neuropeptide, and acts as an agonist of GalR1 and GalR2 receptors, with Kis of both 1 nM.

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