Stanniocalcin 1 (STC-1) Human (HEK)

Description

Total 240 AA. Mw: 25.9 kDa (calculated). C-Terminal Flag-tag, 10AA (highlighted). The AA sequence is identical to Swiss-Prot- P52823.

Amino Acid Sequence

Source

HEK293

Purity

>95%

SDS-PAGE gel

12% SDS-PAGE separation of Human Stanniocalcin-1 1. M.W. marker – 14, 21, 31, 45, 66, 97 kDa 2. reduced and heated sample, 5μg/lane 3. non-reduced and non-heated sample, 5μg/lane

Formulation

Filtered (0,4 μm) and lyophilized in 0.5 mg/mL in 20mM Tris buffer, 20 mM NaCl, pH 7.5

Reconstitution

Add deionized water to prepare a working stock solution of approximately 0.5 mg/mL and let the lyophilized pellet dissolve completely. Product is not sterile! Please filter the product by an appropriate sterile filter before using it in the cell culture.

Storage, Stability/Shelf Life

Store lyophilized protein at –20°C. Lyophilized protein remains stable until the expiry date when stored at –20°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 limited period of time; it does not show any change after two weeks at 4°C.

Quality Control Test

BCA to determine quantity of the protein.

SDS PAGE to determine purity of the protein.

Applications

Cell culture and/or animal studies, ELISA, Western blotting

Note

This product is intended for research use only.

Introduction to the Molecule

Stanniocalcin 1 (STC1) is the mammalian homologue of STC, which was originally identified as a calcium/phosphate-regulating hormone in bony fishes. In contrast, STC1 may play an autocrine and paracrine role with pleiotropic effects in mammals. It is expressed in a wide variety of tissues, but unexpectedly is not detected in the circulation under normal circumstances, which is possibly caused by its attaching to soluble and tethered forms of a high-affinity binding protein.

STC-1 can affect calcium homeostasis, bone and muscle mass and structure, and angiogenesis through effects on osteoblasts, osteoclasts, myoblasts/myocytes, and endothelial cells in mouse model. Differential regulation of myocardial STC1 protein expression was reported in heart failure. In addition, STC1 may regulate calcium currents in cardiomyocytes and may contribute to the alterations in calcium homeostasis of the failing heart. STC1 was foud to be a selective modulator of hepatocyte growth factor (HGF)-induced endothelial migration and morphogenesis, an inhibitor of macrophage chemotaxis and chemokinesis, suppressor of progesterone and luteinization inhibitor. Together with STC-2, it may play important roles in the processes of implantation and decidualization in the rat. In terminally differentiated adipocytes, it may function as a “survival factor”, which contributes to the maintenance of the integrity of mature adipose tissue. In context with its possible role in gestation, a Big STC, a three higher-molecular-mass variant has been described. STC1 was identified as one of hypoxia-responsive genes coupled to hypoxia-driven angiogenesis.

Current research indicates that STC-1 might be a useful molecular marker to detect tumor cells in blood and bone marrow from patients with various types of malignancies.

References

• Fujiwara Y, Sugita Y, Nakamori S, Miyamoto A, Shiozaki K, Nagano H, Sakon M, Monden M. Assessment of Stanniocalcin-1 mRNA as a molecular marker for micrometastases of various human cancers.
• McCudden CR, Majewski A, Chakrabarti S, Wagner GF. Co-localization of stanniocalcin-1 ligand and receptor in human breast carcinomas.
• James K, Seitelbach M, McCudden CR, Wagner GF. Evidence for stanniocalcin binding activity in mammalian blood and glomerular filtrate.
• Xiao LJ, Yuan JX, Song XX, Li YC, Hu ZY, Liu YX. Expression and regulation of stanniocalcin 1 and 2 in rat uterus during embryo implantation and decidualization.
• Yeung HY, Lai KP, Chan HY, Mak NK, Wagner GF, Wong CK. Hypoxia-inducible factor-1-mediated activation of stanniocalcin-1 in human cancer cells.
• Hasselblatt M, Bohm C, Tatenhorst L, Dinh V, Newrzella D, Keyvani K, Jeibmann A, Buerger H, Rickert CH, Paulus W. Identification of novel diagnostic markers for choroid plexus tumors: a microarray-based approach.
• Hasilo CP, McCudden CR, Gillespie JR, James KA, Hirvi ER, Zaidi D, Wagner GF. Nuclear targeting of stanniocalcin to mammary gland alveolar cells during pregnancy and lactation.
• Yoshiko Y, Aubin JE, Maeda N. Stanniocalcin 1 (STC1) protein and mRNA are developmentally regulated during embryonic mouse osteogenesis: the potential of stc1 as an autocrine/paracrine factor for osteoblast development and bone formation.
• Wu S, Yoshiko Y, De Luca F. Stanniocalcin 1 acts as a paracrine regulator of growth plate chondrogenesis.
• Filvaroff EH, Guillet S, Zlot C, Bao M, Ingle G, Steinmetz H, Hoeffel J, Bunting S, Ross J, Carano RA, Powell-Braxton L, Wagner GF, Eckert R, Gerritsen ME, French DM. Stanniocalcin 1 alters muscle and bone structure and function in transgenic mice.
• Zlot C, Ingle G, Hongo J, Yang S, Sheng Z, Schwall R, Paoni N, Wang F, Peale FV Jr, Gerritsen ME. Stanniocalcin 1 is an autocrine modulator of endothelial angiogenic responses to hepatocyte growth factor.
• Yoshiko Y, Maeda N, Aubin JE. Stanniocalcin 1 stimulates osteoblast differentiation in rat calvaria cell cultures.
• Tohmiya Y, Koide Y, Fujimaki S, Harigae H, Funato T, Kaku M, Ishii T, Munakata Y, Kameoka J, Sasaki T. Stanniocalcin-1 as a novel marker to detect minimal residual disease of human leukemia.
• Sheikh-Hamad D, Bick R, Wu GY, Christensen BM, Razeghi P, Poindexter B, Taegtmeyer H, Wamsley A, Padda R, Entman M, Nielsen S, Youker K. Stanniocalcin-1 is a naturally occurring L-channel inhibitor in cardiomyocytes: relevance to human heart failure.
• Kanellis J, Bick R, Garcia G, Truong L, Tsao CC, Etemadmoghadam D, Poindexter B, Feng L, Johnson RJ, Sheikh-Hamad D. Stanniocalcin-1, an inhibitor of macrophage chemotaxis and chemokinesis.
• Wascher RA, Huynh KT, Giuliano AE, Hansen NM, Singer FR, Elashoff D, Hoon DS. Stanniocalcin-1: a novel molecular blood and bone marrow marker for human breast cancer.
• Jiang WQ, Chang AC, Satoh M, Furuichi Y, Tam PP, Reddel RR. The distribution of stanniocalcin 1 protein in fetal mouse tissues suggests a role in bone and muscle development.
• Lal A, Peters H, St Croix B, Haroon ZA, Dewhirst MW, Strausberg RL, Kaanders JH, van der Kogel AJ, Riggins GJ. Transcriptional response to hypoxia in human tumors.
• Serlachius M, Andersson LC. Upregulated expression of stanniocalcin-1 during adipogenesis.