Marinospirillum alkaliphilum DSM 21637 
Average proteome isoelectric point is 6.19 
Get precalculated fractions of proteins 
 
  
    Acidic  
 
  
    pI < 6.8  
 
  
    6.8-7.4  
 
  
    pI > 7.4  
 
  
    Basic  
    
 
  
    All  
 
Note: above files contain also dissociation constants (pKa) 
Virtual 2D-PAGE plot for 2894 proteins (isoelectric point calculated using IPC2_protein) 
 
Get csv file with sequences according to given criteria: 
* You can choose from 21 different methods for calculating isoelectric point 
 Summary statistics related to proteome-wise predictions 
Protein with the lowest isoelectric point: 
>tr|A0A1K1YJJ5|A0A1K1YJJ5_9GAMM Lipopolysaccharide assembly protein B OS=Marinospirillum alkaliphilum DSM 21637 OX=1122209 GN=lapB PE=3 SV=1MM1 pKa = 7.0  ITEE4 pKa = 3.9  QAVNQLAAYY13 pKa = 9.45  IGQLPPAEE21 pKa = 3.94  WDD23 pKa = 3.49  DD24 pKa = 3.96  RR25 pKa = 11.84  LNTAFEE31 pKa = 4.2  EE32 pKa = 5.07  GKK34 pKa = 8.67  VTLCSEE40 pKa = 3.89  NDD42 pKa = 3.22  IPGLAKK48 pKa = 9.93  PVHH51 pKa = 5.96  QGAGFDD57 pKa = 4.31  LYY59 pKa = 11.47  LVDD62 pKa = 5.62  ASNACASLTNDD73 pKa = 3.83  FSRR76 pKa = 11.84  ACGVVVALHH85 pKa = 7.4  DD86 pKa = 5.38  DD87 pKa = 4.11  DD88 pKa = 7.35  DD89 pKa = 4.53  DD90 pKa = 3.94  
 9.64 kDa
Isoelectric point according different methods: 
IPC2.protein.svr19  3.737 
IPC2_protein 3.846 
IPC_protein 3.808 
Toseland    3.592 
ProMoST     3.91 
Dawson      3.808 
Bjellqvist  4.024 
Wikipedia   3.783 
Rodwell     3.643 
Grimsley    3.503 
Solomon     3.795 
Lehninger   3.757 
Nozaki      3.935 
DTASelect   4.19 
Thurlkill   3.668 
EMBOSS      3.783 
Sillero     3.935 
Patrickios  1.901 
IPC_peptide 3.795 
IPC2_peptide  3.91 
IPC2.peptide.svr19  3.869 
 Protein with the highest isoelectric point: 
>tr|A0A1K1X0V5|A0A1K1X0V5_9GAMM Sulfurtransferase OS=Marinospirillum alkaliphilum DSM 21637 OX=1122209 GN=SAMN02745752_01649 PE=4 SV=1MM1 pKa = 7.45  KK2 pKa = 9.51  RR3 pKa = 11.84  TFQPSVLKK11 pKa = 10.49  RR12 pKa = 11.84  KK13 pKa = 7.97  RR14 pKa = 11.84  THH16 pKa = 5.89  GFRR19 pKa = 11.84  ARR21 pKa = 11.84  MATKK25 pKa = 10.4  NGRR28 pKa = 11.84  QVLARR33 pKa = 11.84  RR34 pKa = 11.84  RR35 pKa = 11.84  AKK37 pKa = 9.97  GRR39 pKa = 11.84  KK40 pKa = 8.69  RR41 pKa = 11.84  LCAA44 pKa = 3.9  
 5.22 kDa
Isoelectric point according different methods: 
IPC2.protein.svr19  9.425 
IPC2_protein 10.906 
IPC_protein 12.501 
Toseland    12.661 
ProMoST     13.159 
Dawson      12.661 
Bjellqvist  12.661 
Wikipedia   13.144 
Rodwell     12.369 
Grimsley    12.705 
Solomon     13.159 
Lehninger   13.056 
Nozaki      12.661 
DTASelect   12.661 
Thurlkill   12.661 
EMBOSS      13.159 
Sillero     12.661 
Patrickios  12.106 
IPC_peptide 13.159 
IPC2_peptide  12.149 
IPC2.peptide.svr19  9.087 
 Peptides (in silico  digests for buttom-up proteomics) 
Below you can find 
in silico  digests of the whole proteome with Trypsin, Chymotrypsin, Trypsin+LysC, LysN, ArgC proteases suitable for different mass spec machines.
 
  
    Try  
 
  
    ChTry  
 
  
    ArgC  
 
  
    LysN  
 
  
    TryLysC  
 
  
    Try  
 
  
    ChTry  
 
  
    ArgC  
 
  
    LysN  
 
  
    TryLysC  
 
  
    Try  
 
  
    ChTry  
 
  
    ArgC  
 
  
    LysN  
 
  
    TryLysC  
 
  
    Try  
 
  
    ChTry  
 
  
    ArgC  
 
  
    LysN  
 
  
    TryLysC  
 
  
    Try  
 
  
    ChTry  
 
  
    ArgC  
 
  
    LysN  
 
  
    TryLysC  
   
  
General Statistics 
    
      
        Number of major isoforms
Number of additional isoforms
Number of all proteins
Number of amino acids
Min. Seq. Length
Max. Seq. Length
Avg. Seq. Length
Avg. Mol. Weight
 
     
    
      
        2894 
0
2894 
963687
39
2722
333.0
36.89
          
     
  
 
    Amino acid frequency 
  
  
    
      
        Ala
Cys
Asp
Glu
Phe
Gly
His
Ile
Lys
Leu
 
     
    
                 
        9.976 ± 0.048
0.947 ± 0.015
5.265 ± 0.034
6.222 ± 0.044
3.59 ± 0.031
7.336 ± 0.045
2.389 ± 0.023
4.883 ± 0.034
3.431 ± 0.041
12.612 ± 0.081
          
     
  
  
  
      
          
        Met
Asn
Gln
Pro
Arg
Ser
Thr
Val
Trp
Tyr
 
     
    
                 
        2.472 ± 0.019
3.062 ± 0.034
4.633 ± 0.034
5.75 ± 0.054
6.367 ± 0.035
5.592 ± 0.037
4.9 ± 0.035
6.737 ± 0.038
1.414 ± 0.021
2.422 ± 0.021
          
     
  
  
  
Note:  For amino acid frequency statistics the error has been estimated with the bootstraping (x100) at the protein levelMost of the basic statistics you can see at this page can be downloaded from this CSV file  
For dipeptide frequency statistics click here