Human VEGF145

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Cat-Nr.300-034-E
Size20 µg
Price300 €
SourceE. coli
Formulationlyophilized
Purity Confirmation> 95% by SDS-PAGE & visualized by silver stain
Length [aa]145
Molecular Weight34 kDa
N Terminal SequenceAPMAEGG
Endotoxin Levels< 0.1 ng per µg of human VEGF145
Biological ActivityThe ED50 for stimulation of cell proliferation in human umbilical vein endothelial cells by VEGF145 has been determined to be in the range of 5-10 ng/ml.
Species ReactivityHuman
Buffer50mM acetic acid
Reconstitution The lyophilized VEGF145 should be reconstituted in water to a concentration not lower than 50 µg/ml. For long term storage we recommend to add at least 0.1% human or bovine serum albumin.
Stability and StorageLyophilized samples are stable for greater than six months at -20 °C to -70 °C. Reconstituted VEGF145 should be stored in working aliquots at -20 °C.
Synonymsvascular endothelial growth factor A; VEGFA; VPF; VEGF; MVCD1
DescriptionA vascular endothelial growth factor (VEGF) mRNA species containing exons 1–6 and 8 of the VEGF gene was found to be expressed as a major VEGF mRNA form in several cell lines derived from carcinomas of the female reproductive system. This mRNA is predicted to encode a VEGF form of 145 amino acids (VEGF145). VEGF145 produced in insect cells is a homodimeric, 20,5 kDa protein belonging to the VEGF-A family. Recombinant VEGF145 induced the proliferation of vascular endothelial cells and promoted angiogenesis in vivo. VEGF145 was compared with previously characterized VEGF species with respect to interaction with heparinlike molecules, cellular distribution, VEGF receptor recognition, and extracellular matrix (ECM) binding ability. VEGF145 shares with VEGF165 the ability to bind to the KDR/flk-1 receptor of endothelial cells. It also binds to heparin with an affinity similar to that of VEGF165. However, VEGF145 does not bind to two additional endothelial cell surface receptors that are recognized by VEGF165 but not by VEGF121. VEGF145 is secreted from producing cells as are VEGF121 and VEGF165. However, VEGF121 and VEGF165 do not bind to the ECM produced by corneal endothelial cells, whereas VEGF145 binds efficiently to this ECM. Basic fibroblast growth factor (bFGF)-depleted ECM containing bound VEGF145 induces proliferation of endothelial cells, indicating that the bound VEGF145 is active. The mechanism by which VEGF145 binds to the ECM differs from that of bFGF. Digestion of the ECM by heparinase inhibited the binding of bFGF to the ECM and released prebound bFGF, whereas the binding of VEGF145 was not affected by heparinase digestion. It therefore seems that VEGF145 possesses a unique combination of biological properties distinct from those of previously characterized VEGF species. The other members of this increasing growth factor family are VEGF-B, -C, -D and -E. Another member is the Placenta growth factor PlGF.
Protein SequenceAPMAEGGGQNHHEVVKFMDVYQRSYCHPIETLVDIFQEYPDEIEYIFKPSCVPLMRCGGCCNDEGLECVPTEESNITMQIMRIKPHQGQHIGEMSFLQHNKCECRPKKDRARQEKKSVRG KGKGQKRKRKKSRYKSWSVCDKPRR
Uniprot IDP15692
Protein RefSeqNP_001191313.1
mRNA RefSeqNM_001025366.2

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