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3.4.21.42: complement subcomponent C1s

This is an abbreviated version!
For detailed information about complement subcomponent C1s, go to the full flat file.

Word Map on EC 3.4.21.42

Reaction

Cleavage of Arg-/-Ala bond in complement component C4 to form C4a and C4b, and Lys(or Arg)-/-Lys bond in complement component C2 to form C2a and C2b: the "classical" pathway C3 convertase =

Synonyms

activated complement C1s, C1 esterase, C1-esterase, C1g, C1s, C1s protease, C1s serine protease, complement 1s, complement C.hivin. 1s, complement C1s, complement C1s, activated, complement component 1 s, complement component 1 subcomponent s, complement component C1s, complement protease, complement protease C1s, complement subcomponent 1s, complement subcomponent C1sbar, esterase, C1, mannan-binding lectin-associated serine protease-2, MASP-2, MBL-associated serine protease-2, multiprotein complex C1, protease C1s, serine protease C1s

ECTree

     3 Hydrolases
         3.4 Acting on peptide bonds (peptidases)
             3.4.21 Serine endopeptidases
                3.4.21.42 complement subcomponent C1s

Crystallization

Crystallization on EC 3.4.21.42 - complement subcomponent C1s

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CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
complex between the CUB1-EGF-CUB2 domains of C1r and C1s, sitting drop vapor diffusion method, in imidazole buffer at pH 8.0 with PEG 8000 as the precipitant
crystal structure analysis, PDB IDs 1NZI
crystal structure of of a catalytic fragment comprising the second complement control protein (CCP2) module and the chymotrypsin-like serine protease domain determined and refined to 1.7 A resolution
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crystallization of the whole C1 complex formed by C1q and 2 copies of each protease C1r and C1s
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in the absence of collagen peptide, C1s crystallizes to form a tetramer, similar to the native C1r-C1s-C1r-C1s complex. The tetramer is a flat ring with an outer diameter of about 120 A. The structure is assembled from two X-shaped dimers linked via a connecting interface at the center, structure overview