Threonyl-tRNA Synthetase (PL-7)

During mRNA translation at ribosomes, specific amino-acyl-tRNA synthetases are required for the

covalently attachment between tRNAs and different amino acids.

Threonyl-tRNA synthetase (TARS, PL-7) is specific for the amino acid threonine.

PL-7 is recognized by PL-7 autoantibodies which is present in a subset of patients with polymyositis

and dermatomyositis.

As an autoantigen, PL-7 binds with IgG-type human auto-antibodies.

MSYYHHHHHHDYDIPTTENLYFQGAFEEKASSPSGKMGGEEKPIGAGEEKQKEGGKKKNKEGSGDGGRAELNPWPEYIYTRLEMYNILKAEHDSILAEKAEKDSKPIKVTLPDGKQVDAESWKTTPYQIACGISQGLADNTVIAKVNNVVWDLDRPLEEDCTLELLKFEDEEAQAVYWHSSAHIMGEAMERVYGGCLCYGPPIENGFYYDMYLEEGGVSSNDFSSLEALCKKIIKEKQAFERLEVKKETLLAMFKYNKFKCRILNEKVNTPTTTVYRCGPLIDLCRGPHVRHTGKIKALKIHKNSSTYWEGKADMETLQRIYGISFPDPKMLKEWEKFQEEAKNRDHRKIGRDQELYFFHELSPGSCFFLPKGAYIYNALIEFIRSEYRKRGFQEVVTPNIFNSRLWMTSGHWQHYSENMFSFEVEKELFALKPMNCPGHCLMFDHRPRSWRELPLRLADFGVLHRNELSGALTGLTRVRRFQQDDAHIFCAMEQIEDEIKGCLDFLRTVYSVFGFSFKLNLSTRPEKFLGDIEVWDQAEKQLENSLNEFGEKWELNSGDGAFYGPKIDIQIKDAIGRYHQCATIQLDFQLPIRFNLTYVSHDGDDKKRPVIVHRAILGSVERMIAILTENYGGKWPFWLSPRQVMVVPVGPTCDEYAQKVRQQFHDAKFMADIDLDPGCTLNKKIRNAQLAQYNFILVVGEKEKISGTVNIRTRDNKVHGERTISETIERLQQLKEFRSKQAEEEF

Standard ELISA test, line/dot assay and microarray assay with positive/negative sera panels.

Lyophilized at 1 mg/mL in storage buffer (20mM Tris, 300-500mM NaCl, 10% Glycerol, PH8.0).

Add deionized water to prepare a working stock solution of approximately 1 mg/mL and let thelyophilized pellet dissolve completely.

Expressed in insect Sf9 cells with total 747 AA. Mw: 86.4 KDa (calculated).

N-terminal 6xHis-tag and TEV cleavage site, 25 extra AA (highlighted).

Recombinant antigen for research use or manufacturing only.

Store lyophilized protein at –20°C. Aliquot reconstituted protein and store at –80°C.  Avoid repeatedfreezing /thawing cycles.

BCA to determine quantity of the protein.

SDS PAGE to determine purity of the protein.