Acrp30 (adipocyte complement-related protein of 30kD), also known as AdipoQ, APM1, Adiponectin, Gelatin binding protein 28kD, GBP28 or adipocyte most abundant gene transcript) was identified as a novel adipocyte- specific synthesized and secreted protein with structural resemblance to complement factor C1q. Like adipsin, Acrp30 secretion is induced ~10-fold during adipocyte differentiation. Plasma levels are reduced in obese humans, and low levels are associated with insulin- resistance. Treatment of db/db mice with TZD increased Acrp30 levels. Acrp30 (mouse 247aa, rat human 244aa; chromosome 3q27) consists of a predicted NT-signal sequence aa91-14), followed by a 27-aa unique region, and then by 22 perfect Gly-X-Pro or Gly-X-X collagen like repeats, and a globular segment at the C-terminus. Structurally, but at the sequence level, Acrp30 resembles other collagen-like and globular domain proteins (lung surfactant protein and hepatocytes mannan-binding proteins). Acrp30 is proteolytically cleaved at 104 aa to generate the globular Acrp30 (gAcrp30). Administration of gAcrp30 into mice fed a diet high in fat and sugar caused substantial weight loss. A marked reduction in plasma triglycerides, glucose, and free fatty acids was attributed due in part to increased fatty acid oxidation by muscle. Full length Acrp30 was less potent than gAcrp30. Therefore, gAcrp30 may open new avenues to control obesity. Human gAcrp30 (variant) is a naturally occurring variant of gAcrp30. It has an extra 14aa at the N-terminus that are not found in gAcrp30. ||Source:|Recombinant protein corresponding to human gAcrp30 variant, expressed in E. coli.||Molecular Weight: |~18.1kD||Biological Activity:|Determined by the ability of gAcrp30 to inhibit the proliferation of mouse myeloid cell lines M1. The ED50 is <0.5-1.0ug/mg.||Endotoxin:|0.1ng/ug ||AA Sequence:|Human gAcrp30:|MKGEPGEGAY VYRSAFSVGL ETYVTIPNMP IRFTKIFYNQ QNHYDGSTGK FHCNIPGLYY FAYHITVYMK DVKVSLFKKD KAMLFTYDQY QENNVDQASG SVLLHLEVGD QVWLQVYGEG ERNGLYADND NDSTFTGFLL YHDTN|Human gAcrp30 (variant):|PGAEGPRGFP GIQGRKGEPG EGAYVYRSAF SVGLETYVTI PNMPIRFTKI FYNQQNHYDG STGKFHCNIP GLYYFAYHIT VYMKDVKVSL FKKDKAMLFT YDQYQENNVD QASGSVLLHL EVGDQVWLQV YGEGERNGLY ADNDNDSTFT GFLLYHDTN||Storage and Stability:|May be stored at 4°C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

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