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SAP Protein Human HEK293

  • Regulatory status:RUO
  • Type:Recombinant protein
  • Source:HEK293
  • Other names:Proactivator polypeptide, Prosaposin, PSAP
  • Species:Human
Cat. No. Size Price
1 - 4 pcs / 5 - 9 pcs / 10+ pcs

RD172338100 0.1 mg $300 / $266 / On request
PubMed Product Details
Technical Data


Recombinant protein


Total 518 AA, UniProt P07602 (Gly17-Asn524). MW: 57.7 kDa (calculated), migrates at ~ 65 kDa, alt. at ~ 25 kDa (disaposins) or ~ 35 kDa (trisaposins) on SDS PAGE; N-terminal linker (2 extra AA), C-terminal linker (2 extra AA) and C-terminal His-tag (6 extra AA). Protein identity confirmed by MS.

Amino Acid Sequence





˃ 90 % by SDS-PAGE


12% SDS-PAGE separation of Human PSAP:
1. M.W. marker – 97, 66, 45, 31, 21, 14 kDa
2. reduced and boiled sample, 2.5μg / lane
3. non-reduced and non-boiled sample, 2.5μg / lane


< 1.0 EU/µg


Filtered (0.4 μm) and lyophilized from 0.5 mg/ml solution in phosphate buffered saline, pH 7.4


Add deionized water to prepare a working stock solution of 0.5 mg/mL and let the lyophilized pellet dissolve completely.


Western blotting, ELISA


At ambient temperature. Upon receipt, store the product at the temperature recommended below.


Store lyophilized protein at -80°C. Lyophilized protein remains stable until the expiry date when stored at -80°C. Aliquot reconstituted protein to avoid repeated freezing/thawing cycles and store at -80°C for long term storage. Reconstituted protein can be stored at 4°C for a week.

Quality Control Test

BCA to determine quantity of the protein.
SDS PAGE to determine purity of the protein. Endotoxin level determination.


This product is intended for research use only.


Research topic



Prosaposin is a precursor of four lysosomal saposin proteins (saposin A, B, C and D). Saposins are heat-stable glycoproteins that facilitate the catabolism of glycosphingolipids with short oligosaccharide groups. It stimulates neurite outgrowth and increases choline acetyltransferase activity. Secreted prosaposin is presumed to have additional functions in human milk, cerebrospinal fluid and seminal plasma.

Summary References (2)

References to SAP Protein

  • O'Brien JS, Carson GS, Seo HC, Hiraiwa M, Kishimoto Y. Identification of prosaposin as a neurotrophic factor. Proc Natl Acad Sci U S A. 1994 Sep 27;91 (20):9593-6
  • Schnabel D, Schroder M, Furst W, Klein A, Hurwitz R, Zenk T, Weber J, Harzer K, Paton BC, Poulos A, et al. Simultaneous deficiency of sphingolipid activator proteins 1 and 2 is caused by a mutation in the initiation codon of their common gene. J Biol Chem. 1992 Feb 15;267 (5):3312-5
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