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SRP3064

Sigma-Aldrich

IGF-Binding Protein 4 human

recombinant, expressed in (BTI-Tn-5B1-4) High-5 Insect Cells, ≥98% (SDS-PAGE), ≥98% (HPLC), suitable for cell culture

Synonym(s):

HT29-IGF-BP, IBP-4, colon cancer cell growth inhibitor

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About This Item

UNSPSC Code:
51111800
NACRES:
NA.32

biological source

human

recombinant

expressed in (BTI-Tn-5B1-4) High-5 Insect Cells

Assay

≥98% (HPLC)
≥98% (SDS-PAGE)

form

lyophilized

mol wt

25.8 kDa

packaging

pkg of 20 μg

technique(s)

cell culture | mammalian: suitable

impurities

<0.1 EU/μg endotoxin, tested

color

white to off-white

UniProt accession no.

shipped in

wet ice

storage temp.

−20°C

Gene Information

human ... IGFBP4(3487)

General description

The gene IGFBP4 (insulin-like growth factor-binding protein 4) is mapped to human chromosome 17q21. It belongs to the IGFBP family of proteins. The protein has a IGF (insulin-like growth factor)-binding site and a thyroglobulin type-1 domain. IGFBPs are mainly required to regulate IGFs activities. IGFBP4 can be cleaved by PAPP-A (pregnancy-associated plasma protein-A) in IGF-dependent mechanism.
Recombinant human IGF-BP4 is a 25.7kDa protein consisting of 237 amino acid residues including the IGF-BP domain and thyroglobulin type-I domain.

Application

IGF-Binding Protein 4 human has been used to check the dependency of FSH (follicle-stimulating hormone) action in human Cumulus granulosa cells on IGF-2 (insulin-like growth factor 2).

Biochem/physiol Actions

IGFBP4 (insulin-like growth factor-binding protein 4) suppresses cell proliferation and DNA synthesis and induces cell death. IGFBP4 participates in adipose tissue expandability and interacts with IGF1 (insulin-like growth factor 1). Interaction with IGF1 disrupts mitogenic signaling. IGFBP4 is suggested as a serum biomarker of Lupus Nephritis and is associated with the chronicity of renal pathology in patients. IGFBP4 is also linked with cardiovascular death in type 1 diabetes patients in the absence/presence of nephropathy. It is also linked with the progression of tumors.

Sequence

DEAIHCPPCS EEKLARCRPP VGCEELVREP GCGCCATCAL GLGMPCGVYT PRCGSGLRCY PPRGVEKPLH TLMHGQGVCM ELAEIEAIQE SLQPSDKDEG DHPNNSFSPC SAHDRRCLQK HFAKIRDRST SGGKMKVNGA PREDARPVPQ GSCQSELHRA LERLAASQSR THEDLYIIPI PNCDRNGNFH PKQCHPALDG QRGKCWCVDR KTGVKLPGGL EPKGELDCHQ LADSFRE

Physical form

Lyophilized from 1x PBS, pH 7.2.

Reconstitution

Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 week. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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A J Ryan et al.
British journal of cancer, 101(2), 278-286 (2009-06-19)
Insulin-like growth factor 1 (IGF1) promotes breast cancer and disease progression. Bioavailability of IGF1 is modulated by IGF-binding proteins (IGFBPs). IGFBP4 inhibits IGF1 activity but cleavage by pregnancy-associated plasma protein-A (PAPP-A) protease releases active IGF1. Expression of IGF pathway components
P M Schiltz et al.
Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research, 8(4), 391-396 (1993-04-01)
This laboratory has purified a unique insulin-like growth factor binding protein (IGFBP-4) that was previously demonstrated to be inhibitory to bone cell proliferation. In this study, the hypothesis that IGFBP-4 is inhibitory to insulin-like growth factor (IGF) actions on cartilage
FSH Regulates IGF-2 Expression in Human Granulosa Cells in an AKT-Dependent Manner.
Baumgarten SC, et al.
The Journal of Clinical Endocrinology and Metabolism, 100, E1046-E1046 (2015)
Gene expression profiles in asbestos-exposed epithelial and mesothelial lung cell lines.
Nymark P, et al.
BMC Genomics, 8, 62-62 (2007)
Control of adipose tissue expandability in response to high fat diet by the insulin-like growth factor-binding protein-4.
Gealekman O, et al.
The Journal of Biological Chemistry, 289, 18327-18327 (2014)

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