Tag Content
SG ID
SG00008042 
UniProt Accession
Theoretical PI
6.37  
Molecular Weight
26247 Da  
Genbank Nucleotide ID
Genbank Protein ID
Gene Name
Apcs 
Gene Synonyms/Alias
Ptx2, Sap 
Protein Name
Serum amyloid P-component 
Protein Synonyms/Alias
SAPFlags: Precursor 
Organism
Mus musculus (Mouse) 
NCBI Taxonomy ID
10090 
Chromosome Location
chr:1;174824093-174825185;-1
View in Ensembl genome browser  
Function in Stage
Uncertain 
Function in Cell Type
Uncertain 
Probability (GAS) of Function in Spermatogenesis
0.180571196 
The probability was calculated by GAS algorithm, ranging from 0 to 1. The closer it is to 1, the more possibly it functions in spermatogenesis.
Description
Temporarily unavailable 
Abstract of related literatures
1. A genomic DNA clone corresponding to the mouse serum amyloid P component (SAP) has been isolated and characterized for the first time. The numbers of exons, the relative sites of intron/exon junctions, and the size of the coding region for mature SAP protein are all in complete agreement with those of the human SAP gene. In the 5'-flanking region of the mouse SAP gene, there is a small DNA segment (43-base pairs) which is highly homologous with the corresponding region of the human SAP gene. However, most parts of the 5'-flanking regions are not conserved between the mouse and human SAP genes, and several phorbol ester-responsive element-like sequences are present only in the mouse SAP gene. PMID: [3263126] 

2. A CBA/J-strain mouse serum amyloid P component (SAP) genomic clone was isolated and analysed. The clone contains the entire SAP gene and specifies a primary transcript of 1065 nucleotide residues. This comprises a first exon of 206 nucleotide residues containing the mRNA 5'-untranslated region and sequence encoding the pre-SAP leader peptide and the first two amino acid residues of mature SAP separated by a single 110-base intron from a 749-nucleotide-residue second exon containing sequence encoding the bulk of the mature SAP and specifying the mRNA 3'-untranslated region. The overall organization is similar to that of the human SAP gene, and the coding region and intron sequences are highly conserved. The SAP RNA cap site was defined by primer extension analysis of polyadenylated acute-phase liver RNA. The 5'-region of the mouse SAP gene contains modified CAAT and TATA promoter elements preceded by a putative hepatocyte-nuclear-factor-1-recognition site; these structures are in a region that is highly homologous to the corresponding region of the human SAP gene. Comparisons of the mouse SAP gene structure and derived amino acid sequence with those of other mammalian pentraxins were made. PMID: [2481440] 

3. In contrast to other animals, the biosynthesis of serum amyloid P component in mice is regulated as an acute-phase protein. As a first step in studying the regulation and biosynthesis of serum amyloid P component in the mouse, cDNA clones have been isolated from a liver cDNA library and sequenced. The largest of these clones was 960 bp in length, and contained an open reading frame encoding a protein of 224 amino acids. Comparison of the mouse cDNA sequence to that published for humans (Mantzouranis, E. C., S. B. Dowton, A. S. Whitehead, M. D. Edge, G. A. P. Bruns, and H. R. Colten, 1985. J. Biol. Chem. 260:7752.) revealed 74% identity for nucleotides in the translated region. Northern-blot analysis demonstrated that murine serum amyloid P component synthesis in the liver is directed by a 1.2-kb mRNA that is elevated in high responder (C57BL/6J) mice after thioglycollate-induced inflammation. PMID: [3183383] 


5. The National Institutes of Health's Mammalian Gene Collection (MGC) project was designed to generate and sequence a publicly accessible cDNA resource containing a complete open reading frame (ORF) for every human and mouse gene. The project initially used a random strategy to select clones from a large number of cDNA libraries from diverse tissues. Candidate clones were chosen based on 5'-EST sequences, and then fully sequenced to high accuracy and analyzed by algorithms developed for this project. Currently, more than 11,000 human and 10,000 mouse genes are represented in MGC by at least one clone with a full ORF. The random selection approach is now reaching a saturation point, and a transition to protocols targeted at the missing transcripts is now required to complete the mouse and human collections. Comparison of the sequence of the MGC clones to reference genome sequences reveals that most cDNA clones are of very high sequence quality, although it is likely that some cDNAs may carry missense variants as a consequence of experimental artifact, such as PCR, cloning, or reverse transcriptase errors. Recently, a rat cDNA component was added to the project, and ongoing frog (Xenopus) and zebrafish (Danio) cDNA projects were expanded to take advantage of the high-throughput MGC pipeline. PMID: [15489334] 


7. A comprehensive understanding of the mouse plasma proteome is important for studies using mouse models to identify protein markers of human disease. To enhance our analysis of the mouse plasma proteome, we have developed a method for isolating low-abundance proteins using a cysteine-containing glycopeptide strategy. This method involves two orthogonal affinity capture steps. First, glycoproteins are coupled to an azlactone copolymer gel using hydrazide chemistry and cysteine residues are then biotinylated. After trypsinization and extensive washing, tethered N-glycosylated tryptic peptides are released from the gel using PNGase F. Biotinylated cysteinyl-containing glycopeptides are then affinity selected using a monomeric avidin gel and analyzed by LC-MS/MS. We have applied the method to a proteome analysis of mouse plasma. In two independent analyses using 200 muL each of C57BL mouse plasma, 51 proteins were detected. Only 42 proteins were seen when the same plasma sample was analyzed by glycopeptides only. A total of 104 N-glycosylation sites were identified. Of these, 17 sites have hitherto not been annotated in the Swiss-Prot database whereas 48 were considered probable, potential, or by similarity - i.e., based on little or no experimental evidence. We show that analysis by cysteine-containing glycopeptides allows detection of low-abundance proteins such as the epidermal growth factor receptor, the Vitamin K-dependent protein Z, the hepatocyte growth factor activator, and the lymphatic endothelium-specific hyaluronan receptor as these proteins were not detected in the glycopeptide control analysis. PMID: [17330941] 

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Function
 
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Subcellular Location
Secreted. 
Tissue Specificity
 
Gene Ontology
GO IDGO termEvidence
GO:0031012 C:extracellular matrix IEA:Compara.
GO:0005615 C:extracellular space IEA:Compara.
GO:0043234 C:protein complex IEA:Compara.
GO:0046872 F:metal ion binding IEA:UniProtKB-KW.
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Interpro
IPR008985;    ConA-like_lec_gl.
IPR013320;    ConA-like_subgrp.
IPR001759;    Pentaxin.
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Pfam
PF00354;    Pentaxin;    1.
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SMART
SM00159;    PTX;    1.
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PROSITE
PS00289;    PENTAXIN;    1.
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PRINTS
PR00895;    PENTAXIN.;   
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Created Date
18-Oct-2012 
Record Type
GAS predicted 
Sequence Annotation
SIGNAL        1     20
CHAIN        21    224       Serum amyloid P-component.
                             /FTId=PRO_0000023542.
DOMAIN       21    224       Pentaxin.
METAL        78     78       Calcium 1 (By similarity).
METAL        79     79       Calcium 1 (By similarity).
METAL       156    156       Calcium 1 (By similarity).
METAL       156    156       Calcium 2 (By similarity).
METAL       157    157       Calcium 1; via carbonyl oxygen (By
                             similarity).
METAL       158    158       Calcium 1 (By similarity).
METAL       158    158       Calcium 2 (By similarity).
METAL       168    168       Calcium 2 (By similarity).
MOD_RES       1      1       N-acetylmethionine (By similarity).
MOD_RES      12     12       Phosphothreonine (By similarity).
MOD_RES      13     13       Phosphoserine (By similarity).
MOD_RES      22     22       Phosphothreonine (By similarity).
CARBOHYD     52     52       N-linked (GlcNAc...).
DISULFID     56    115       By similarity.
CONFLICT    151    151       I -> V (in Ref. 3; AAA40092/CAA32243).
CONFLICT    154    154       G -> R (in Ref. 4; CAA68488).
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Nucleotide Sequence
Length: 959 bp   Go to nucleotide: FASTA
Protein Sequence
Length: 224 bp   Go to amino acid: FASTA
The verified Protein-Protein interaction information
UniProt
Gene Symbol Ref Databases
Other Protein-Protein interaction resources
String database  
View Microarray data
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