Recombinant Lactobacillus Acidophilus S-Layer Protein (SLPA) Protein (His&Myc)

Name: Recombinant Lactobacillus Acidophilus S-Layer Protein (SLPA) Protein (His&Myc)
Brand: Beta LifeScience
SKU: BLC-01011P
Availability: InStock

Greater than 90% as determined by SDS-PAGE.

Collections: High-quality recombinant proteins, Other recombinant proteins

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Product Overview

Description	Recombinant Lactobacillus Acidophilus S-Layer Protein (SLPA) Protein (His&Myc) is produced by our E.coli expression system. This is a full length protein.
Purity	Greater than 90% as determined by SDS-PAGE.
Uniprotkb	P35829
Target Symbol	SLPA
Synonyms	(Surface layer protein)(SA-protein)
Species	Lactobacillus acidophilus (strain ATCC 700396 / NCK56 / N2 / NCFM)
Expression System	E.coli
Tag	N-10His&C-Myc
Target Protein Sequence	AVSTVSAATTINASSSAINTNTNAKYDVDVTPSVSAVAANTANNTPAIAGNLTGTISASYNGKTYTANLKADTENATITAAGSTTAVKPAELAAGVAYTVTVNDVSFNFGSENAGKTVTLGSANSNVKFTGTNSDNQTETNVSTLKVKLDQNGVASLTNVSIANVYAINTTDNSNVNFYDVTSGATVTNGAVSVNADNQGQVNVANVVAAINSKYFAAQYADKKLNTRTANTEDAIKAALKDQKIDVNSVGYFKAPHTFTVNVKATSNTNGKSATLPVVVTVPNVAEPTVASVSKRIMHNAYYYDKDAKRVGTDSVKRYNSVSVLPNTTTINGKTYYQVVENGKAVDKYINAANIDGTKRTLKHNAYVYASSKKRANKVVLKKGEVVTTYGASYTFKNGQKYYKIGDNTDKTYVKVANFR
Expression Range	25-444aa
Protein Length	Full Length of Mature Protein
Mol. Weight	51.7 kDa
Research Area	Others
Form	Liquid or Lyophilized powder
Buffer	Liquid form: default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. Lyophilized powder form: the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.
Reconstitution	Briefly centrifuged the vial prior to opening to bring the contents to the bottom. Reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL. It is recommended to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20°C/-80°C. The default final concentration of glycerol is 50%.
Storage	1. Store at -20°C/-80°C upon receipt, aliquoting is necessary for mutiple use. 2. Avoid repeated freeze-thaw cycles. 3. Store working aliquots at 4°C for up to one week. 4. In general, protein in liquid form is stable for up to 6 months at -20°C/-80°C. Protein in lyophilized powder form is stable for up to 12 months at -20°C/-80°C.
Notes	Repeated freezing and thawing is not recommended. Store working aliquots at 4°C for up to one week.

Target Details

Target Function	The S-layer is a paracrystalline mono-layered assembly of proteins which coat the surface of bacteria.
Subcellular Location	Secreted, cell wall, S-layer. Note=This bacterium is covered by a S-layer with hexagonal symmetry.
Database References	KEGG: lac:LBA0169 STRING: 272621.LBA0169

Gene Functions References

present study supports the importance of cell surface structure of L. acidophilus L-92 for SlpA anchoring on the cell surface needed for immunomodulatory effect PMID: 25454604
the major S layer protein, SlpA, of L. acidophilus NCFM is the first probiotic bacterial DC-SIGN ligand identified that is functionally involved in the modulation of dendritic and T cells functions PMID: 19047644

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.