Register or Login
  • All
  • Uniprot Id
  • Catalog #
  • Peptide Sequence
>   home   >   Products   >   Peptides   >   Blocking Peptides   >   SPAG8 Antibody (C-term) Blocking peptide   

SPAG8 Antibody (C-term) Blocking peptide

Synthetic peptide

Product Information
Primary Accession Q99932
Clone Names 100405075
Peptide ID 100405075
Additional Information
Gene ID 26206
Other Names Sperm-associated antigen 8, HSD-1, Sperm membrane protein 1, SMP-1, Sperm membrane protein BS-84, SPAG8
Format Synthetic peptide was lyophilized with 100% acetonitrile and is supplied as a powder. Reconstitute with 0.1 ml DI water for a final concentration of 1 mg/ml.
StorageMaintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C.
PrecautionsThis product is for research use only. Not for use in diagnostic or therapeutic procedures.
Protein Information
Name SPAG8
Function Plays a role in spermatogenesis by enhancing the binding of CREM isoform tau to its coactivator FHL5 and increasing the FHL5-regulated transcriptional activation of CREM isoform tau (By similarity). Involved in the acrosome reaction and in binding of sperm to the zona pellucida (By similarity). Plays a role in regulation of the cell cycle by controlling progression through the G2/M phase, possibly by delaying the activation of CDK1 which is required for entry into mitosis (PubMed:19548270). May play a role in fertility and microtubule formation through interaction with RANBP9 (PubMed:10500252).
Cellular Location Cytoplasm {ECO:0000250|UniProtKB:Q3V0Q6}. Nucleus {ECO:0000250|UniProtKB:Q3V0Q6}. Cytoplasmic vesicle, secretory vesicle, acrosome Cytoplasm, cytoskeleton, microtubule organizing center. Cytoplasm, cytoskeleton, spindle. Note=In mature sperm cells, detected in the acrosomal region of the head and in the middle piece of the tail (By similarity). Localized to the nucleus and cytoplasm of spermatocytes and round spermatids while, in elongating spermatids, expressed in the cytoplasm but not in the nucleus (By similarity). During the cell cycle, localized on the microtubule-organizing center (MTOC) during prophase. In metaphase, extends along spindle microtubules. In anaphase, detected on the astral microtubules and mid-zone. In telophase, remains at the mid-zone. After cytokinesis, returns to the MTOC (PubMed:19548270). {ECO:0000250|UniProtKB:Q3V0Q6, ECO:0000269|PubMed:19548270}
Tissue Location Expressed in testis (germ cells), but not in liver, kidney, prostate and small intestine
Research Areas
Citations (0)

Thousands of laboratories across the world have published research that depended on the performance of antibodies from Abcepta to advance their research. Check out links to articles that cite our products in major peer-reviewed journals, organized by research category.

Submit your citation using an Abcepta antibody to, and receive a free "I Love Antibodies" mug.


The correlation of anti-sperm antibodies with cases ofunexplained infertility implicates a role for these antibodies inblocking fertilization. Improved diagnosis and treatment ofimmunologic infertility, as well as identification of proteins fortargeted contraception, are dependent on the identification andcharacterization of relevant sperm antigens. The protein encoded bythis gene is recognized by sperm agglutinating antibodies from aninfertile woman. This protein is localized in germ cells of thetestis at all stages of spermatogenesis and is localized to theacrosomal region of mature spermatozoa. Alternatively splicedvariants that encode different protein isoforms have been describedbut the full-length sequences of only two have been determined.


Wu, H., et al. FEBS Lett. 584(13):2807-2815(2010)Li, R., et al. Cell Biochem. Funct. 27(5):264-268(2009)Cheng, G.Y., et al. Asian J. Androl. 9(1):23-29(2007)Tang, X., et al. J. Mol. Med. 82(6):383-388(2004)Humphray, S.J., et al. Nature 429(6990):369-374(2004)

Abcepta welcomes feedback from its customers.

If you have used an Abcepta product and would like to share how it has performed, please click on the "Submit Review" button and provide the requested information. Our staff will examine and post your review and contact you if needed.

If you have any additional inquiries please email technical services at

Cat# BP12827b
Availability: Back Order
Bulk Size
Seasonal Special on Bulk Order
Request Quote Here

Ordering Information

United States
AlbaniaAustraliaAustriaBelgiumBosnia & HerzegovinaBrazilBulgariaCanadaCentral AmericaChinaCroatiaCyprusCzech RepublicDenmarkEstoniaFinlandFranceGermanyGreeceHong KongHungaryIcelandIndiaIndonesiaIrelandIsraelItalyJapanLatviaLithuaniaLuxembourgMacedoniaMalaysiaMaltaNetherlandsNew ZealandNorwayPakistanPolandPortugalRomaniaSerbiaSingaporeSlovakiaSloveniaSouth AfricaSouth KoreaSpainSwedenSwitzerlandTaiwanTurkeyUnited KingdomUnited StatesVietnamWorldwideOthers
Abcepta, Inc.
(888) 735-7227 / (858) 622-0099
(858) 622-0609
USA Headquarters
(888) 735-7227 / (858) 622-0099 or (858) 875-1900

Shipping Information

Domestic orders (in stock items)
Shipped out the same day. Orders placed after 1 PM (PST) will ship out the next business day.
International orders
Contact your local distributors
Terms & Conditions