Creative Biolabs is offering the most comprehensive services for antibody development projects. With strict regulation and effective execution, we are dedicated to providing the most valuable solutions to complete your projects.
HighlightsCreative Biolabs is offering the most comprehensive services for antibody development projects. With strict regulation and effective execution, we are dedicated to providing the most valuable solutions to complete your projects.
HighlightsCreative Biolabs has established a broad range of platforms for developing novel antibodies or equivalents. These cutting-edge technologies enable our scientists to meet your demands from different aspects and tailor the most appropriate solution that contributes to the success of your projects.
HighlightsWith deep understanding in antibody-related realms and extensive project experience, Creative Biolabs offers a variety of references to help you learn more about our capacities and achievements, including infographic, flyer, case study, peer-reviewed publications, and all kinds of knowledge that can assist your projects. You are also welcome to contact us directly for more specific solutions.
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Loading...All listed services and products are For Research Use Only. Do Not use in any diagnostic or therapeutic applications.
Calmegin (CLGN) is a testis-restricted endoplasmic reticulum integral chaperone protein encoded by CLGN gene, selectively expressed in spermatogenic cell lineages, localized exclusively to ER membrane bilayers of developing sperm cells. Distinct from ubiquitous ER chaperones, CLGN relies on calcium-binding domains and client protein interaction pockets to mediate maturation of sperm-surface adhesion factors, while simultaneously controlling the folding of zona pellucida-binding receptors required for gamete recognition. Under steady spermatogenic differentiation, basal CLGN chaperone activity sustains stable maturation of fertilization-related surface proteins without defective gamete formation. Upon sperm terminal differentiation, sustained CLGN client binding ensures proper assembly of egg-interacting membrane complexes to support gamete fusion capacity. Unlike broad-spectrum ER folding factors with general housekeeping roles, CLGN bears spermatogenesis-specific chaperone functions that cannot be fully compensated by other calcium-binding chaperones, linking ER protein folding directly to male gamete fertilization competence pathways. Loss of functional CLGN severely disrupts sperm surface receptor maturation and abolishes gamete-egg binding capacity, while altered CLGN expression impairs orderly spermatogenic differentiation, establishing CLGN as a core research target for reproductive chaperone biology and fertility regulatory compound screening.
CLGN executes core calcium-dependent chaperone function embedded within endoplasmic reticulum lipid bilayers, utilizing conserved EF-hand calcium-binding motifs and substrate-binding cavities to mediate selective folding of spermatogenic client glycoproteins. Conserved client recognition regions exclusively target sperm membrane fertilization receptors, separating its substrate spectrum from widely distributed ER chaperone client pools. CLGN-mediated protein folding bridges ER biosynthetic processing and gamete surface complex assembly, balancing chaperone folding efficiency and sperm differentiation progression according to developmental stage demands. CLGN participates in extensive physiological processes including calcium homeostasis, sperm receptor maturation and gamete fertilization competence establishment. Deficient CLGN expression disrupts sperm-egg recognition machinery and impairs male fertility potential. Therefore, CLGN represents a pivotal research target for ER membrane chaperone study and reproductive modulator screening.
Fig. 1 Domain architecture and three-dimensional crystal structure of CLGN (Calmegin) compared with homologous ER chaperones Calnexin and Calreticulin, showing lectin glycan-binding pocket and Ca²⁺ binding motifs.1
The biological functions of CLGN are focused on calcium ion coordination, client protein folding and gamete fertility regulation:
Creative Biolabs offers high-quality CLGN proteins through optimized expression systems, including full-length ER chaperone protein and isolated calcium-binding domain variants. These products retain native client folding activity, suitable for chaperone-substrate interaction and reproductive modulator screening. All CLGN proteins undergo strict quality control to ensure consistent performance and reliable application across diverse research platforms.
Not finding the membrane protein product you need? Contact us to start your one-stop custom service!
Creative Biolabs provides custom-engineered CLGN stable cell lines, including overexpression and blank control models. These cell lines are optimized for chaperone expression profiling and spermatogenic protein folding functional analysis. Each cell line undergoes stringent validation to ensure stable expression profiles and consistent functional performance in diverse experimental contexts.
Not finding the stable cell line product you need? Contact us to start your one-stop custom service!
High-specificity recombinant antibodies targeting CLGN are developed via advanced antibody engineering technologies, with no cross-reactivity with other ER calcium-binding chaperones. These antibodies are validated for endoplasmic reticulum membrane localization detection and testicular tissue expression profiling, and can be combined with sperm surface marker reagents to analyze complete CLGN-client folding complexes in spermatogenic cell models.
Not finding the recombinant antibody product you need? Contact us to start your one-stop custom service!
Beyond catalog products, Creative Biolabs offers specialized custom services for CLGN research:
CLGN is a testis-specific ER calcium chaperone that mediates folding of sperm surface receptors required for gamete fertilization.
CLGN acts as a critical link between ER protein folding and male gamete fertility competence, governing sperm-egg recognition capacity.
No, all CLGN products and services are strictly for research use only, not intended for clinical diagnosis or treatment.
Offerings include full-length CLGN ER chaperone proteins, isoform-specific detection antibodies and custom stable cell lines for reproductive research.
CLGN proteins are validated via calcium-dependent client protein binding functional testing.
