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C6780

Sigma-Aldrich

α-Casein from bovine milk

≥70% αs-casein basis (electrophoresis), lyophilized powder

Synonym(s):

alpha-S1-casein, alpha-S2-casein

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About This Item

CAS Number:
9000-71-9
EC Number:
232-555-1
MDL number:
MFCD00130477
UNSPSC Code:
12352202
NACRES:
NA.61

biological source

bovine milk

Quality Level

200

Assay

≥70% αs-casein basis (electrophoresis)

form

lyophilized powder

technique(s)

mass spectrometry (MS): suitable

UniProt accession no.

P02662
P02663

storage temp.

−20°C

InChI

1S/C81H125N22O39P/c1-36(2)31-50(76(132)94-43(15-24-57(87)108)71(127)101-52(34-64(120)121)78(134)98-49(81(137)138)11-7-8-30-82)99-72(128)47(19-28-61(114)115)95-77(133)51(33-63(118)119)100-73(129)48(20-29-62(116)117)97-80(136)65(37(3)104)103-75(131)44(16-25-58(88)109)92-68(124)42(14-23-56(86)107)90-67(123)41(13-22-55(85)106)91-69(125)45(17-26-59(110)111)93-70(126)46(18-27-60(112)113)96-79(135)53(35-142-143(139,140)141)102-74(130)40(12-21-54(84)105)89-66(122)39(83)32-38-9-5-4-6-10-38/h4-6,9-10,36-37,39-53,65,104H,7-8,11-35,82-83H2,1-3H3,(H2,84,105)(H2,85,106)(H2,86,107)(H2,87,108)(H2,88,109)(H,89,122)(H,90,123)(H,91,125)(H,92,124)(H,93,126)(H,94,132)(H,95,133)(H,96,135)(H,97,136)(H,98,134)(H,99,128)(H,100,129)(H,101,127)(H,102,130)(H,103,131)(H,110,111)(H,112,113)(H,114,115)(H,116,117)(H,118,119)(H,120,121)(H,137,138)(H2,139,140,141)

InChI key

BECPQYXYKAMYBN-UHFFFAOYSA-N

Gene Information

cow ... CSN1(282208) , CSN1S2(282209)

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Application

α-Casein from bovine milk is an Immunoglobulin E (IgE)-binding epitope belonging to the Casein phosphoprotein family. It has been used in studies of children with insulin-dependent diabetes mellitus (IDDM), due to the strong cross-reactivity of α-casein antibodies with insulin. Studies of children displaying (IDDM) show higher levels of α-casein antibodies than control siblings, which may serve as a risk marker for IDDM.

Biochem/physiol Actions

α-Casein can be an immunogen in young children, and anti-a-casein antibodies have strong cross-reactivity with insulin. This effect can explain the uncommon insulin autoimmunity, but it does not appear to progress to Type I diabetes.

Preparation Note

Chromatographically purified

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Richard D Unwin et al.
Nature protocols, 4(6), 870-877 (2009-05-16)
The application of a targeted mass spectrometric workflow to the sensitive identification of post-translational modifications is described. This protocol employs multiple reaction monitoring (MRM) to search for all putative peptides specifically modified in a target protein. Positive MRMs trigger an
Andreas Luxenburger et al.
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K Adler et al.
Clinical and experimental immunology, 164(1), 42-49 (2011-03-03)
Insulin autoantibodies (IAA) can appear in children within months of introducing solid foods to the diet and before clinical type 1 diabetes. The aim of this study was to determine whether infant dietary antigens could be immunizing agents of IAA.
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The effect of adjunct culture Monascus purpureus BD-M-4 on the physicochemical, proteolytic, and lipolytic properties of surface mold-ripened cheese were evaluated. During the maturation of Monascus-fermented cheese, the total microbiota count and the content of soluble nitrogen increased steadily, whereas
C S Dey et al.
Journal of cell science, 100 ( Pt 4), 815-824 (1991-12-01)
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