Orexin B (mouse, rat)

Modify Date: 2024-01-04 17:46:10

Orexin B (mouse, rat) Structure
Orexin B (mouse, rat) structure
Common Name Orexin B (mouse, rat)
CAS Number 202801-92-1 Molecular Weight 2936.401
Density 1.5±0.1 g/cm3 Boiling Point N/A
Molecular Formula C126H215N45O34S Melting Point N/A
MSDS N/A Flash Point N/A

 Use of Orexin B (mouse, rat)


Orexin B, rat, mouse is an endogenous agonist at Orexin receptor with Kis of 420 and 36 nM for OX1 and OX2, respectively.

 Names

Name Orexin B
Synonym More Synonyms

 Orexin B (mouse, rat) Biological Activity

Description Orexin B, rat, mouse is an endogenous agonist at Orexin receptor with Kis of 420 and 36 nM for OX1 and OX2, respectively.
Related Catalog
Target

Ki: 420 nM (OX1), 36 nM (OX2)[1]

In Vitro Orexin B is derived by proteolytic amino acid precursor, prepro-orexin, which is encoded by a gene localized to chromosome 17q21 in humans. In radioligand binding studies, Orexin B has a higher affinity for the OX2 receptor[1]. Human Orexin B has two amino acid substitutions when compared with the rodent sequence. OX2 receptor is indeed a high-affinity receptor for human orexin B, with an IC50 of 36 nM in the binding assay and an EC50 of 60 nM in the [Ca2+]i transient assay. Human Orexin B has significantly lower affinity for the human OX1: the calculated IC50 in the competitive binding assay and the EC50 in the [Ca2+]i transient assay are 420 nM and 2500 nM for human orexin-B, respectively[2].
In Vivo Human Orexin B significantly augments food intake; at the 2 hr time point, 5- and 12-fold stimulation of food consumption is observed by 3 nM and 30 nM orexin-B, respectively[2].
Animal Admin Rats[2] 3 nM and 30 nM of synthetic human Orexin B is administered in a 5 mL bolus through a catheter placed in the left lateral ventricle of Male Wistar rats (180–200 g) in early light phase. Cumulative food consumption is observed and plotted over the period of 4 hr after injection[2].
References

[1]. Smart D, et al. Orexins: a new family of neuropeptides. Br J Anaesth. 1999 Nov;83(5):695-7.

[2]. Sakurai T, et al. Orexins and orexin receptors: a family of hypothalamic neuropeptides and G protein-coupled receptors that regulate feeding behavior. Cell. 1998 Feb 20;92(4):573-85.

 Chemical & Physical Properties

Density 1.5±0.1 g/cm3
Molecular Formula C126H215N45O34S
Molecular Weight 2936.401
Exact Mass 2934.619873
LogP -9.21
Index of Refraction 1.670
Storage condition −20°C
Water Solubility Soluble in 1% acetic acid at 1mg/ml

 Safety Information

WGK Germany 3

 Synonyms

L-Arginyl-L-prolylglycyl-L-prolyl-L-prolylglycyl-L-leucyl-L-glutaminylglycyl-L-arginyl-L-leucyl-L-glutaminyl-L-arginyl-L-leucyl-L-leucyl-L-glutaminyl-L-alanyl-L-asparaginylglycyl-L-asparaginyl-L-histidyl-L-alanyl-L-alanylglycyl-L-isoleucyl-L-leucyl-L-threonyl-L-methioninamide
L-Methioninamide, L-arginyl-L-prolylglycyl-L-prolyl-L-prolylglycyl-L-leucyl-L-glutaminylglycyl-L-arginyl-L-leucyl-L-glutaminyl-L-arginyl-L-leucyl-L-leucyl-L-glutaminyl-L-alanyl-L-asparaginylglycyl-L-asparaginyl-L-histidyl-L-alanyl-L-alanylglycyl-L-isoleucyl-L-leucyl-L-threonyl-
Orexin B, rat, mouse