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Hyaluronidase degrades hyaluronic acid, a major structural proteoglycan found in extracellular matrices and basement membranes. 再加上，我们可以发SPAM1 抗体 (34) 和 SPAM1 试剂盒 (6)和数多这个蛋白质的别的产品。
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PH20 is elevated in demyelinating lesions and that increased PH20 expression is sufficient to inhibit oligodendrocyte precursor cell maturation and remyelination.
ACR or PRSS21 or both may function cooperatively with SPAM1 in sperm/cumulus penetration
The data from this paper suggests that the hyaluronan-degrading activity of the sperm hyaluronidase SPAM1 may not be required for fertilization, at least in the mouse.
Entrapment of spontaneous Spam1 mutations, owing to recombination suppression near the Robertsonion translocation junctions, is proposed as the major underlying defect of the sperm dysfunction.
sperm lacking cell surface hyaluronidase PH-20 can pass through the layer of cumulus cells and fertilize the egg
Epididymal Spam1 is secreted predominantly as insoluble particles. Majority of epididymal Spam1 is released with its lipid anchor, a form in which it can bind to sperm.
Spam1 is a multifunctional protein and that it is less restricted in its expression than previously reported
Sperm adhesion molecule 1 (SPAM1) is distributed in the nonciliated epithelial cells. Efferent ducts have the most intense staining. Spam1 was also present in the accessory organs, the prostate, and seminal vesicles and its fluid.
Testicular compartmentalization of Spam1 RNA provides strong support for the lack of sharing hypothesis, and represents a possible mechanism of Spam1-associated transmission ratio distortion .
Mouse SPAM1 and HYAL5 but not HYALP1 proteins exhibit hyaluronidase activity at neutral pH.
SPAM1 is implicated in fluid reabsorption and urine concentration
First documentation of vesicular interaction with the sperm plasma membrane provides a model for the possible transfer mechanism of SPAM1 and other glycosyl phosphatidylinositol (GPI)-linked proteins to the sperm surface in reproductive fluids.
SPAM1 may function in sperm entry into the cumulus and sperm penetration through the cumulus matrix.
Human posterior head 20 (hPH20) and homo sapiens sperm acrosome associated 1 (hSPACA1) immunocontraceptive epitopes reduced fertility in male/female mice.
results indicate that neither rHuPH20 nor its directly generated HA catabolites have inflammatory properties in the air pouch model, and rHuPH20 can instead inhibit some aspects of inflammation, such as neutrophil infiltration into the air pouch.
HSPA2 regulates the expression of sperm surface receptors involved in human sperm-oocyte recognition, such as arylsulfatase A and SPAM1.
The interaction between SPAM1, ARSA and HSPA2 in a multimeric complex mediating sperm-egg interaction.
SPAM1 mRNA & protein occur in all 3 regions of epididymis & vas deferens. It has hyaluronidase activity at pH 7.0. The proximal promoter has epididymal transcription factor sites including androgen receptor elements. Its role may be in sperm maturation.
Bovine testicular hyaluronidase 3D-model demonstrated lysine residue stratification during enzyme modification.
the effect of metal cations on the transglycosylation by bovine testicular hyaluronidase using as substrates metal salts of glycosaminoglycan chains was investigated.
results clearly demonstrate that ejaculated bull sperm possess two forms of sperm adhesion molecule 1(SPAM1): one (epididymal) expressed at the surface, and one (testicular) that interacts with the zona pellucida after the acrosome exocytosis.
The hydrolysis Vm values strongly suggest that as the chain length decreases the hyaluronidase increasingly catalyses transglycosylation rather than hydrolysis.
The simplicity, sensitivity, and versatility of the fluorescent substrate (termed FRET-HA) suggest that it will have utility in a variety of assay platforms and should be a new tool for assessing hyaluronidase activity.
Hyaluronidase degrades hyaluronic acid, a major structural proteoglycan found in extracellular matrices and basement membranes. Six members of the hyaluronidase family are clustered into two tightly linked groups on chromosome 3p21.3 and 7q31.3. This gene was previously referred to as HYAL1 and HYA1 and has since been assigned the official symbol SPAM1\; another family member on chromosome 3p21.3 has been assigned HYAL1. This gene encodes a GPI-anchored enzyme located on the human sperm surface and inner acrosomal membrane. This multifunctional protein is a hyaluronidase that enables sperm to penetrate through the hyaluronic acid-rich cumulus cell layer surrounding the oocyte, a receptor that plays a role in hyaluronic acid induced cell signaling, and a receptor that is involved in sperm-zona pellucida adhesion. Abnormal expression of this gene in tumors has implicated this protein in degradation of basement membranes leading to tumor invasion and metastasis. Multiple transcript variants encoding different isoforms have been found for this gene.
, hyaluronidase PH-20
, hyaluronoglucosaminidase PH-20
, sperm surface protein PH-20
, sperm protein PH-20
, PH-20 protein
, sperm surface antigen 2B1
, sperm adhesion molecule 1 (PH-20 hyaluronidase, zona pellucida binding) L homeolog
, hyaluronidase, zona pellucida binding
, sperm adhesion molecule 1