C1q Protein

Purified human C1q protein


Product Specifications

Citations31
Description

Purified human C1q protein

Storage

Store at -70°C or below. Avoid freeze/thaw.

Form

Frozen liquid. 10 mM HEPES, 300 mM NaCl, pH 7.2, No preservative, 0.22 µm filtered.

Concentration

1.0 mg/mL (refer to CoA for lot specific concentration)

Applications

See citations and technical data sheet for application info.

Ordering Information

For Research Use Only. Not for use in diagnostic procedures.
Catalog NumberA400
Catalog Number (CE)N/A
Size1.0 ml
Price (USD)$275.00
Price (EURO)245,00 €

Contact us

US Phone+1 (858) 552 1100
EU Phone+353 (91) 412 474
US Emailcontact-us@quidelortho.com
EU Emailcontact-emea@quidelortho.com

Specifications

Description

Purified human C1q protein

Size1.0 ml
Storage

Store at -70°C or below. Avoid freeze/thaw.

Form

Frozen liquid. 10 mM HEPES, 300 mM NaCl, pH 7.2, No preservative, 0.22 µm filtered.

Concentration1.0 mg/mL (refer to CoA for lot specific concentration)
ApplicationsSee citations and technical data sheet for application info.
Purity>98% by SDS PAGE
SourceNormal human serum
Activity > 1,000,000 C1H50 units/mg
Molecular Weight410,000 Da (18 chains)
Background

Purified human complement component C1q. Circulating C1q protein is a hexamer of three unique protein subunits (A, B, and C) with molecular weights of 29, 26 and 22 kD respectively. The assembled hexamer contains a central core or stalk, 6 collagen-like domains and 6 globular protein heads. These globular or terminal regions are responsible for the binding of immunoglobulins (IgM and IgG). As part of the C1 complex (together with two copies each of C1r and C1s) C1q is central to activation of the classical complement pathway.

Citations

TitleYearApplicationsSample SpeciesSampleSample Details

Dendrimer end-terminal motif-dependent evasion of human complement and complement activation through IgM hitchhiking.

2021Protein AssayHuman

Plasma

N/A

EGFR modulates complement activation in head and neck squamous cell carcinoma.

2020IFCell Culture

HNSCC Cells

N/A

Complement C1q stimulates the progression of hepatocellular tumor through the activation of discoidin domain receptor 1

2018Cell Migration AssayCell Culture

HepG2 cells

N/A

The Surface-Exposed Protein SntA Contributes to Complement Evasion in Zoonotic Streptococcus suis

2018ELISAHuman

Purified protein

N/A

rIgG1 Fc Hexamer Inhibits Antibody-Mediated Autoimmune Disease via Effects on Complement and FcγRs

2018ELISAHuman

Serum

Fc activation

Number of individual ACPA reactivities in synovial fluid immune complexes, but not serum anti-CCP2 levels, associate with inflammation and joint destruction in rheumatoid arthritis

2018ELISAHuman

Serum

Immune Complexes

Effector-attenuating Substitutions That Maintain Antibody Stability and Reduce Toxicity in Mice

2017ELISAHuman

C1q Protein

Binding Assay

Non-Complement-Binding De Novo Donor-Specific Anti-HLA Antibodies and Kidney Allograft Survival

2016Binding AssayHuman

Serum

dnDSA

Apoptosis signal-regulating kinase 1 mediates striatal degeneration via the regulation of C1q

2016Complement Activation AssayRat

Protein Injection

N/A

Evading pre-existing anti-hinge antibody binding by hinge engineering

2016ELISAHuman

Serum

Anti-hinge antibodies

C1q Deficiency and Neuropsychiatric Systemic Lupus Erythematosus

2016ELISAHuman

Serum

N/A

Intramolecular immunological signal hypothesis revived--structural background of signalling revealed by using Congo Red as a specific tool

2015Complement Activation AssaySheep

Red Blood Cells

N/A

Complement protein C1q modulates neurite outgrowth in vitro and spinal cord axon regeneration in vivo

2015ELISA, IPMouse

Brain Tissue

Cerebellum myelin substrate

The Natural Human IgM Antibody PAT-SM6 Induces Apoptosis in Primary Human Multiple Myeloma Cells by Targeting Heat Shock Protein GRP79

2013ELISAN/A

PAT-SM6 Antibody (coating)

N/A

SIGN-R1, a C-type lectin, enhances apoptotic cell clearance through the complement deposition pathway by interacting with C1q in the spleen

2013FCHuman

Thymocyte Cells

N/A

Natural antibody to apoptotic cell membranes inhibits the proinflammatory properties of lupus autoantibody immune complexes

2012Complement Activation AssayCell Culture

C57BL/6

Bone marrow cells

MBL interferes with endovascular trophoblast invasion in pre-eclampsia

2012ELISAHuman

Extravillous trophoblast cells

N/A

C6 knock-out mice are protected from thrombophilia mediated by antiphospholipid antibodies

2012ELISAHuman

IgG Antibody

IgG-APS, IgG-MHS, IgM-APS, IgM-NHS

Quantitative evaluation of fucose reducing effects in a humanized antibody on Fcγ receptor binding and antibody-dependent cell-mediated cytotoxicity activities

2012ELISAN/A

CD-20 Antibody (AbX)

N/A

The salivary scavenger and agglutinin binds MBL and regulates the lectin pathway of complement in solution and on surfaces

2012ELISAN/A

rSALSA

N/A

Expression of complement components, receptors and regulators by human dendritic cells

2011ELISAHuman

Dendritic Cell

N/A

Tim-3 negatively regulates IL-12 expression by monocytes in HCV infection

2011FCHuman

Peripheral blood mononuclear cells

N/A

Complement C1q enhances homing-related responses of hematopoietic stem/progenitor cells

2010Chemotaxis AssayHuman

Hematopoietic stem/progenitor cells

N/A

Mutations within a human IgG2 antibody form distinct and homogeneous disulfide isomers but do not affect Fc gamma receptor or C1q binding

2010ELISAN/A

CD44 (coating)

N/A

Alternative complement pathway deregulation is correlated with dengue severity

2009ELISAHuman

Plasma

Dengue

Local inflammation induces complement crosstalk which amplifies the antimicrobial response

2009ELISAN/A

C1q Protein

N/A

Complement C1q activates tumor suppressor WWOX to induce apoptosis in prostate cancer cells

2009IFHuman

Prostate Tissue

N/A

Highly specific inhibition of C1q globular-head binding to human IgG: a novel approach to control and regulate the classical complement pathway using an engineered single chain antibody variable fragment

2008ELISAHamster

CHO Cells

pEE-QuVHVL Transfected

Structural characterization of a human Fc fragment engineered for lack of effector functions

2008ELISAN/A

C1q Protein

N/A

Decidual endothelial cells express surface-bound C1q as a molecular bridge between endovascular trophoblast and decidual endothelium

2008WBHuman

Purified protein

N/A

Presence of plasma complement regulatory proteins clusterin (Apo J) and vitronectin (S40) on circulating immune complexes (CIC)

2006ELISAN/A

Purified protein

Standard curve generation