Discovery Structure Gene, mRNA, and precursor Synthesis and release Receptors Signal transduction pathway Biological functions Clinical implications
ChemicalBook > CAS DataBase List > MELANIN CONCENTRATING HORMONE, SALMON

MELANIN CONCENTRATING HORMONE, SALMON

Discovery Structure Gene, mRNA, and precursor Synthesis and release Receptors Signal transduction pathway Biological functions Clinical implications
Product Name
MELANIN CONCENTRATING HORMONE, SALMON
CAS No.
87218-84-6
Chemical Name
MELANIN CONCENTRATING HORMONE, SALMON
Synonyms
MCH (SALMON);MELANIN CONCENTRATING HORMONE;Salmon melanin-concentrating hormone;MELANIN CONCENTRATING HORMONE, SALMON;Melanin concentrating hormone salmon, ≥90%;MCH (salMon) Melanin-Concentrating HorMone (salMon);Melanin-concentratinghormone (Oncorhynchus keta) (9CI);ASP-THR-MET-ARG-CYS-MET-VAL-GLY-ARG-VAL-TYR-ARG-PRO-CYS-TRP-GLU-VAL;Asp-Thr-Met-Arg-c[Cys-Met-Val-Gly-Arg-Val-Tyr-Arg-Pro-Cys]-Trp-Glu-Val;H-ASP-THR-MET-ARG-CYS-MET-VAL-GLY-ARG-VAL-TYR-ARG-PRO-CYS-TRP-GLU-VAL-OH
CBNumber
CB1314540
Molecular Formula
C89H139N27O24S4
Formula Weight
2099.5
MOL File
87218-84-6.mol
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MELANIN CONCENTRATING HORMONE, SALMON Property

Density 
1.52±0.1 g/cm3(Predicted)
storage temp. 
−20°C
solubility 
Soluble in DMSO
form 
Solid
color 
White to off-white
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Safety

Safety Statements 
22-24/25
WGK Germany 
3
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Hazard and Precautionary Statements (GHS)

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N-Bromosuccinimide Price

Alfa Aesar
Product number
J66264
Product name
Melanin Concentrating Hormone, salmon
Packaging
0.5mg
Price
$181
Updated
2021/12/16
Alfa Aesar
Product number
J66264
Product name
Melanin Concentrating Hormone, salmon
Packaging
1mg
Price
$282
Updated
2021/12/16
Usbiological
Product number
M2867-76E
Product name
Melanin Concentrating Hormone
Packaging
1mg
Price
$450
Updated
2021/12/16
Usbiological
Product number
M2867-76H
Product name
Melanin Concentrating Hormone
Packaging
1mg
Price
$531
Updated
2021/12/16
Usbiological
Product number
M2867-76J
Product name
Melanin Concentrating Hormone
Packaging
1mg
Price
$276
Updated
2021/12/16
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MELANIN CONCENTRATING HORMONE, SALMON Chemical Properties,Usage,Production

Discovery

It was realized in 1928 that the administration of teleost pituitary gland extract led to concentrated pigment in fish scales. In 1983, Kawauchi purified and sequenced the factor, named melanin-concentrating hormone (MCH), for the first time from the salmon pituitary. In mammals, the primary structure of rat MCH was determined by purification methods in 1989, and that of the human was determined from the cDNA sequence in 1990.

Structure

Human proMCH consists of 165 aa residues with mature MCH at the C-terminus. Mature MCH is cleaved at the KR sequence either by prohormone convertase PC1/3 or PC2. MCH is a cyclic peptide formed by a disulfide bridge, and comprises 19 aa residues in tetrapods and 17 aa residues (MCH1) or 19–25 aa residues (MCH2) in teleost fish. The primary structure is well conserved; human MCH is identical to that of rodents and is highly similar to that of teleost fish. The central ring sequence between two cysteines is the most significant factor for melanin concentrating activity. Mr 2386.8; pI >9.5 (mouse, rat, human MCH). MCH is freely soluble in water, ethanol, and 70% acetone; insoluble in acetone, benzene, chloroform, and ether.

Gene, mRNA, and precursor

The human MCH gene (PMCH), located on chromosome 12 (12q 23-q24), consists of three exons.3 Exon 2 encodes neuropeptide G-E (NGE) and neuropeptide E-I (NEI), and exons 2 and 3 encode MCH. Two variant PMCH genes are also identified on 5p14 (PMCHL1) and 5q12-q13 (PMCHL2), but only a single locus is found in the rodent species. Teleost MCH2 is the ortholog of mammalian MCH, and MCH1 is a highly conserved paralog of MCH2. The MCH2 gene might be silent in some teleost fish such as salmonids.

Synthesis and release

In rodents, MCH neurons receive projections from many brain areas and become active during REM sleep and novel object exploration. Neurotransmitters such as GABA, serotonin, acetylcholine, noradrenaline, dopamine, and neuropeptide Y all inhibit the MCH neurons. The firing of orexin neurons also inhibits MCH neurons via microcircuits. The metabolic factors glucose and insulin can enhance MCH neuronal activity, although glucose exerts the opposite effect on the orexin neurons. MCH may be coreleased with glutamate, GABA, or other neuropeptides and act synergistically. The activation of hypothalamic MCH neuron terminals reduced the firing of hippocampal pyramidal neurons by increasing the inhibitory inputs.

Receptors

MCH acts via two G protein-coupled receptors, MCHR1 and MCHR2, of which functional MCHR2 is not present in rodents. MCHR1 is a glycoprotein consisting of 353 aa residues in the rat/human and maps to chromosome 22, q13.3 in humans. MCH binds to rat and human MCHR1s with Kd values of 1.6 and 0.5 nM, respectively. Strong labeling of MCHR1 mRNA is detected in several limbic structures and anatomical areas implicated in the control of olfaction in rats. MCHR1 is observed to be selectively targeted to a hair-like organelle named the primary cilium on the rodent and human neuronal cell. Human MCHR2 is also highly expressed in the brain.

Signal transduction pathway

In recombinant cell lines, rat, mouse, and human MCHR1s are promiscuous, and couple to various GTP binding proteins such as Gi, Go, and Gq proteins. In contrast to human MCHR1, however, human MCHR2 exclusively couples to the Gq protein.

Biological functions

The transgenic mice overexpressing the MCH gene are obese and insulin-resistant. Mice lacking the MCH gene are hypophagic, hyperactive, and lean. The MCH gene is upregulated in the leptin-deficient ob/ob mice. MCHR1-/- mice are hyperphagic but lean because of hyperactivity and altered metabolism. REM sleep-active MCH neurons in the hypothalamus are involved in active forgetting in the hippocampus. In addition, mood-, memory-, and sleep-related phenotypes are also reported.

Clinical implications

So far, no hereditary diseases have been associated with MCH, MCHR1, or MCHR2 genes. The association of obesity with SNP in PMCH, MCH1R, and MCH2R has been investigated, but the results were not consistent. A case having autoimmunity to MCHR1 is reported to have developed vitiligo. In an orexin-deficient mouse model of narcolepsy, the MCH-MCHR1 system contributes to abnormal REM sleep regulation manifest as cataplexy.

Description

Melanin-concentrating hormone is an orexigenic peptide produced in the lateral hypothalamic area and zona incerta of the mammalian brain. MCH neurons constitute a powerful regulatory system with wide and divergent projection, associated with food intake, energy expenditure, mood, REM sleep, and memory.

MELANIN CONCENTRATING HORMONE, SALMON Preparation Products And Raw materials

Raw materials

Preparation Products

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MELANIN CONCENTRATING HORMONE, SALMON Suppliers

3B Pharmachem (Wuhan) International Co.,Ltd.
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821-50328103-801 18930552037
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86-21-50328109
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China
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GL Biochem (Shanghai) Ltd
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21-61263452 13641803416
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86-21-61263399
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ymbetter@glbiochem.com
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China
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Shanghai Hanhong Scientific Co.,Ltd.
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021-54306202 13764082696
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Chemsky(shanghai)International Co.,Ltd.
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China
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Cellmano Biotech Limited
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0551-65326643 18156095617
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Wuxi Zhongkun Biochemical Technology Co., Ltd.
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Creative Peptides
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United States
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Codow Chemical Co.,Ltd.
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Shanghai Chaolan Chemical Technology Center
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Nanjing Leon Biological Technology Co., Ltd.
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87218-84-6, MELANIN CONCENTRATING HORMONE, SALMONRelated Search:


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