ID:SPAG5_HUMAN DESCRIPTION: RecName: Full=Sperm-associated antigen 5; AltName: Full=Astrin; AltName: Full=Deepest; AltName: Full=Mitotic spindle-associated protein p126; Short=MAP126; FUNCTION: Essential component of the mitotic spindle required for normal chromosome segregation and progression into anaphase. Required for chromosome alignment, normal timing of sister chromatid segregation, and maintenance of spindle pole architecture. The astrin (SPAG5)-kinastrin (SKAP) complex promotes stable microtubule-kinetochore attachments. SUBUNIT: Homodimer, with a globular head domain and a long stalk. Homooligomer; the globular head domains associate, resulting in aster-like structures. Binds to microtubules in the mitotic spindle. Interacts with DCLRE1B/Apollo. Part of an astrin (SPAG5)- kinastrin (SKAP) complex containing SKAP, SPAG5, PLK1, DYNLL1 and SGOL2. Interacts with SKAP. SUBCELLULAR LOCATION: Cytoplasm. Cytoplasm, cytoskeleton, spindle. Cytoplasm, cytoskeleton, spindle pole. Chromosome, centromere, kinetochore. Note=In a punctate pattern in interphase cells. During mitosis, detected at spindle poles during prophase, throughout the spindle in metaphase and anaphase, and at midzone microtubules in anaphase and telophase. Detected on kinetochores of chromosomes that have congressed. The astrin (SPAG5)-kinastrin (SKAP) complex localizes to the microtubule plus ends (By similarity). TISSUE SPECIFICITY: Highly expressed in testis. Detected at low levels in placenta, liver, pancreas, thymus and colon. PTM: Phosphorylated upon DNA damage, probably by ATM or ATR. SEQUENCE CAUTION: Sequence=AAD02813.1; Type=Frameshift; Positions=1093; Sequence=AAL06396.2; Type=Frameshift; Positions=1135;
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
Protein Domain and Structure Information
ModBase Predicted Comparative 3D Structure on Q96R06
Front
Top
Side
The pictures above may be empty if there is no ModBase structure for the protein. The ModBase structure frequently covers just a fragment of the protein. You may be asked to log onto ModBase the first time you click on the pictures. It is simplest after logging in to just click on the picture again to get to the specific info on that model.
Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
US Server
Sequence and Links to Tools and Databases 
Common Gene Haplotype Alleles 
