C1q Human-Complement Component

our services
our products
Quotations & Ordering:

For quotations, please use our online quotation form, and you may also contact us by

[email protected]

Phone:

+1-888.733.6849
+1-617.299.7367 (Int’l)
+44-203.695.3777 (UK)

Fax:

+1-888.733.6849
+1-617.299.7367 (Int’l)

Our customer service representatives are available 24 hours, Monday through Friday to assist you.

C1q Human

Qty


Total
$260
Catalog #
PRPS-561
Size
Description
Human Complement Component C1q produced in Human plasma having a molecular mass of 410 kDa.
Additional Information
IntroductionC1q is the first component of the classical pathway of complement activation. C1q along with the enzymatically active components C1r and C1s forms the C1 complex. When C1 binds to immunoglobulins in the form of immune complexes, it leads to activation of C1r and C1s proteases and a further activates the classical pathway of complement. C1q is a glycoprotein that belongs to the collectin family, having a molecular weight of about 410-462 kDa. C1q is a hexamer composed of globular heads attached to collagen-like triple-helix tails. The globular heads of C1q exclusively bind to the CH2 domain of IgG molecules or the CH3 domain of IgM. Each heavy chain of the immunoglobulin molecule contains a single binding site for C1q. Given that C1q must bind to no less than two heavy chains in order to alter its conformation and activate C1r and C1s, its activation follows only after binding to immunoglobulins in the form of immune complexes bound to multivalent antigens. C1q’s main physiological role is in the clearance of immune complexes and apoptotic bodies from the organism. Interruption of this process may lead to development of autoimmunity. Individuals with genetic deficiencies of C1q or other components of the classical pathway are at risk to develop SLE. C1q specifically binds to apoptotic bodies of human keratinocytes, vascular endothelial cells and lymphocytes. Complement components C1q and bound C3 mediate the clearance of apoptotic bodies. Hence, C1q may advance the clearance of autoantigens, avoiding stimulation of the immune system. Nonetheless, an extended exposition of the immune system to the neoepitope exposed on C1q molecules bound to immune complexes or apoptotic bodies could ultimately lead to an autoimmune response against C1q itself and to an altered complement function. C1q deficiency may also lead to disruption of the negative selection of autoreactive B cells. C1q along with other specific recognition proteins bind to the highly conserved lupus antigens (dsDNA and nuclear proteins) and activate the complement system. Autoantibodies against C1q (anti-C1q) are found in a number of autoimmune and infectious diseases like glomerulonephritis (GN) and lupus erythematosus (SLE), these antibodies are significant in clinical practice due to their negative predictive value.
SynonymsComponent C1q, Complement C1q, Complement Component C1q, C1q.
SourceHuman Plasma.
Physical AppearanceSterile Filtered White lyophilized (freeze-dried) powder.
FormulationLyophilized from 0.01M Na2 EDTA solution containing 0.3M NaCl pH 7.5.
SolubilityIt is recommended to reconstitute the lyophilized C1q in sterile 18MΩ-cm H2O.
StabilityHuman C1q althoµgh stable at room temperature for 3 weeks, should be stored between 2-8°C. Do not freeze!
PurityGreater than 96.0%.
UsageNeoScientific's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drµgs, agricultural or pesticidal products, food additives or household chemicals.
Background

N/A

Protocol

N/A

MSDS
Reviews
Neo Scientific welcomes feedback from its customers.

If you have used an our product and would like to share how it has performed, please click on the "Submit Review" button and provide the requested information.

If you have any additional inquiries please email technical services at [email protected].

Thank you for your support.

promotions

Image

Custom Monoclonal Antibody
MassAb Technologies
Image
Free Trial Custom Polyclonal Antibody
You will receive free purified antibodies for validation
Image
Custom Peptides Synthesis

Start from $40/each

new technologies

Image
Optimized for enhanced
expression levels
XPromoter 2.0
Image
E.coli/insect cells/293 & CHO

3 in 1 expression system
Image
MassAb Technologies

Cover All Epitopes