CALB1 Human

Calbindin-1 Human Recombinant
Cat. No.
BT28364
Source
Escherichia Coli.
Synonyms
Calbindin, Vitamin D-dependent calcium-binding protein, avian-type, Calbindin D28, D-28K, CALB1, CAB27, CALB, calbindin 1 28kDa.
Appearance
Sterile Filtered colorless solution.
Purity
Greater than 95.0% as determined by SDS-PAGE.
Usage
THE BioTek's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

CALB1 Human Recombinant produced in E.Coli is a single, non-glycosylated, polypeptide chain containing 261 amino acids (1-261 a.a.) and having a molecular mass of 30kDa.
The CALB1 is purified by proprietary chromatographic techniques.

Product Specs

Introduction
Calbindin 1 (CALB1), a calcium-binding protein belonging to the troponin C superfamily, plays a crucial role in calcium regulation. This includes calcium transport, uptake, bone and teeth calcification, and calcium-dependent signaling in neurons, as well as transient roles during embryonic development. CALB1 also exhibits neuroprotective properties against apoptotic cell death. It functions by buffering cytosolic calcium and potentially activating a membrane Ca2+-ATPase and a 3',5'-cyclic nucleotide phosphodiesterase. Interestingly, the biological activity of CALB1 appears to be linked to the redox state of its five cysteine residues.
CALB1 possesses four active calcium-binding domains and two modified domains that seem to have lost their calcium-binding capacity. Its expression is primarily observed in neural tissues, with brain synthesis being independent of vitamin-D-derived hormones.
Dysregulation of CALB1 has been implicated in neurological disorders such as epilepsy, amyotrophic lateral sclerosis, and Huntington's disease. Notably, neurons in the brains of Huntington's disease patients exhibit CALB1 depletion.
Description
Recombinant human CALB1, produced in E. coli, is a non-glycosylated polypeptide chain consisting of 261 amino acids (1-261 a.a.). With a molecular weight of 30kDa, it is purified using proprietary chromatographic techniques.
Physical Appearance
A clear, colorless solution that has been sterilized by filtration.
Formulation
The CALB1 protein solution is supplied in a buffer containing 20mM Tris-HCl (pH 8.0), 1mM DTT, 10% glycerol, and 2mM EDTA.
Stability
For short-term storage (up to 2-4 weeks), the product can be stored at 4°C. For extended storage, freezing at -20°C is recommended.
To ensure long-term stability, adding a carrier protein such as HSA or BSA (0.1%) is advised.
Repeated freezing and thawing should be avoided.
Purity
The purity of the CALB1 protein is greater than 95.0% as determined by SDS-PAGE analysis.
Synonyms
Calbindin, Vitamin D-dependent calcium-binding protein, avian-type, Calbindin D28, D-28K, CALB1, CAB27, CALB, calbindin 1 28kDa.
Source
Escherichia Coli.
Amino Acid Sequence
MAESHLQSSL ITASQFFEIW LHFDADGSGY LEGKELQNLI QELQQARKKA GLELSPEMKT FVDQYGQRDD GKIGIVELAH VLPTEENFLL LFRCQQLKSC EEFMKTWRKY DTDHSGFIET EELKNFLKDL LEKANKTVDD TKLAEYTDLM LKLFDSNNDG KLELTEMARL LPVQENFLLK FQGIKMCGKE FNKAFELYDQ DGNGYIDENE LDALLKDLCE KNKQDLDINN ITTYKKNIMA LSDGGKLYRT DLALILCAGD N.

Product Science Overview

Structure and Function

Calbindin-1 is a 28 kDa protein that contains four active calcium-binding domains and two modified domains that have lost their calcium-binding capability . This protein acts as a calcium buffer and calcium sensor, capable of holding four Ca²⁺ ions in the EF-hands of loops EF1, EF3, EF4, and EF5 . It is thought to buffer the entry of calcium upon stimulation of glutamate receptors .

Expression and Role in the Central Nervous System

Calbindin-1 is expressed in discrete neuronal populations within the central nervous system (CNS) and is believed to act as an intracellular calcium-buffering protein . Most Purkinje cells express calbindin, which is expressed when neurons start to migrate and differentiate . This protein plays a crucial role in regulating calcium levels within neurons, which is essential for various cellular processes.

Clinical Significance

Depletion of calbindin-1 has been noted in patients with Huntington’s disease, suggesting its importance in maintaining neuronal health . Additionally, calbindin-1 has been studied for its potential role in neurodegenerative diseases and other conditions related to calcium dysregulation.

Recombinant Calbindin-1

Recombinant calbindin-1 is produced using recombinant DNA technology, which involves inserting the CALB1 gene into a suitable expression system, such as bacteria or yeast, to produce the protein in large quantities. This recombinant protein is used in various research applications to study its structure, function, and role in different biological processes.

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