Recombinant Proteins

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CENPB Human

Centromere Protein B Human Recombinant

This product consists of recombinant human CENPB protein produced in SF9 insect cells. It is glycosylated and has a molecular weight of 80 kDa. For purification and detection purposes, a 6x His tag is attached to the N-terminus. The protein is purified using proprietary chromatographic techniques.
Shipped with Ice Packs
Cat. No.
BT6942
Source
Sf9 insect cells.
Appearance
Sterile, filtered liquid.

CENPH Human

Centromere Protein-H Human Recombinant

Recombinantly produced in E.coli, CENPH Human is a single, non-glycosylated polypeptide chain. This 133 amino acid chain (136-247) has a molecular weight of 15.5 kDa. For purification, a 20 amino acid His-Tag is fused to the N-terminus, and proprietary chromatographic techniques are employed.
Shipped with Ice Packs
Cat. No.
BT7032
Source
E.coli.
Appearance
A clear, sterile solution.

CENPM Human

Centromere Protein-M Human Recombinant

CENPM Human Recombinant produced in E.coli is a single, non-glycosylated polypeptide chain containing 203 amino acids (1-180) and having a molecular mass of 22.0kDa. CENPM is fused to a 23 amino acid His-tag at the N-terminus and purified by proprietary chromatographic techniques.
Shipped with Ice Packs
Cat. No.
BT7094
Source
Escherichia Coli.
Appearance
Sterile filtered colorless solution.

CENPP Human

Centromere Protein-P Human Recombinant

Recombinant human CENPP protein produced in E. coli is a single, non-glycosylated polypeptide chain containing 308 amino acids (amino acids 1-288) and has a molecular mass of 35.3 kDa. CENPP is fused to a 20 amino acid His-tag at the N-terminus and is purified using proprietary chromatographic techniques.
Shipped with Ice Packs
Cat. No.
BT7213
Source
Escherichia Coli.
Appearance
A sterile, colorless solution.

CENPA Human

Centromere Protein A Human Recombinant

CENPA Human Recombinant, produced in SF9 cells, is a glycosylated polypeptide chain with a molecular weight of 17,015 Daltons. This protein is expressed with a -6x His tag and purified using proprietary chromatographic methods.
Shipped with Ice Packs
Cat. No.
BT6814
Source
Sf9 insect cells.
Appearance
Clear, sterile liquid.

CENPQ Human

Centromere Protein-Q Human Recombinant

Recombinant CENPQ, produced in E. coli, is a single, non-glycosylated polypeptide chain consisting of 291 amino acids (residues 1-268) with a molecular weight of 33 kDa. This protein includes a 23 amino acid His-tag fused at the N-terminus and is purified using proprietary chromatographic techniques.
Shipped with Ice Packs
Cat. No.
BT7306
Source
Escherichia Coli.
Appearance
Clear, colorless solution, sterile-filtered.

CENPU Human

Centromere Protein-U Human Recombinant

Recombinant human CENPU, expressed in E. coli, is a single, non-glycosylated polypeptide chain. This protein consists of 295 amino acids (147-418a.a), resulting in a molecular mass of 33.7 kDa. The N-terminus of CENPU is fused to a 23 amino acid His-tag. Purification is achieved through proprietary chromatographic techniques.
Shipped with Ice Packs
Cat. No.
BT7371
Source
Escherichia Coli.
Appearance
Clear, sterile-filtered solution.
Definition and Classification

Centromere proteins are specialized proteins that play a crucial role in the function of the centromere, a region of the chromosome essential for accurate segregation during cell division. The centromere is the site where the kinetochore assembles, allowing chromosomes to attach to spindle fibers and ensuring proper distribution to daughter cells . Centromere proteins can be classified into various types based on their functions and interactions, including centromere protein A (CENP-A), CENP-B, CENP-C, and others .

Biological Properties

Centromere proteins exhibit several key biological properties:

  • Expression Patterns: Centromere proteins are expressed in a cell cycle-dependent manner, with peak expression during mitosis and meiosis .
  • Tissue Distribution: These proteins are ubiquitously present in all dividing cells, with higher concentrations in tissues with high mitotic activity, such as bone marrow and epithelial tissues .
Biological Functions

The primary biological functions of centromere proteins include:

  • Chromosome Segregation: Centromere proteins are essential for the proper segregation of chromosomes during cell division .
  • Immune Responses and Pathogen Recognition: While their primary role is in cell division, some centromere proteins have been implicated in immune responses and pathogen recognition .
Modes of Action

Centromere proteins interact with other molecules and cells through various mechanisms:

  • Binding Partners: Centromere proteins, such as CENP-A, replace histone H3 in the nucleosome, forming a unique chromatin structure that is recognized by other centromere proteins .
  • Downstream Signaling Cascades: These proteins recruit and interact with kinetochore proteins, facilitating the attachment of spindle microtubules and activating signaling pathways that ensure accurate chromosome segregation .
Regulatory Mechanisms

The expression and activity of centromere proteins are tightly regulated through several mechanisms:

  • Transcriptional Regulation: The transcription of centromere protein genes is controlled by cell cycle-dependent transcription factors .
  • Post-Translational Modifications: Centromere proteins undergo various post-translational modifications, such as phosphorylation and ubiquitination, which regulate their stability and function .
Applications

Centromere proteins have several applications in biomedical research and clinical practice:

  • Biomedical Research: Studying centromere proteins helps in understanding the mechanisms of chromosome segregation and the causes of chromosomal instability .
  • Diagnostic Tools: Antibodies against centromere proteins are used in diagnostic assays for certain autoimmune diseases .
  • Therapeutic Strategies: Targeting centromere proteins is being explored as a potential therapeutic strategy for cancer treatment .
Role in the Life Cycle

Centromere proteins play a vital role throughout the life cycle:

  • Development: They are essential for the proper segregation of chromosomes during embryonic development .
  • Aging and Disease: Dysregulation of centromere proteins can lead to chromosomal instability, contributing to aging and the development of diseases such as cancer .
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