Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5579
Number of amino acids:210
Molecular Weight:22890.02 Da
Theoretical pI:4.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)94.29%
Cysteine CYS (C)62.86%
Glutamic Acid GLU (E)94.29%
Aspartic Acid ASP (D)136.19%
Glycine GLY (G)199.05%
Phynylalanine PHE (F)209.52%
Isoleucine ILE (I)104.76%
Histidine HIS (H)41.9%
Lysine LYS (K)104.76%
Methionine MET (M)41.9%
Leucine LEU (L)178.1%
Asparagine ASN (N)115.24%
Glutamine GLN (Q)83.81%
Proline PRO (P)104.76%
Serine SER (S)167.62%
Arginine ARG (R)52.38%
Threonine THR (T)178.1%
Tryptophan TRP (W)00%
Valine VAL (V)199.05%
Tyrosine TYR (Y)31.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1028
HydrogenH1580
NitrogenN262
OxygenO310
SulphurS10

FormulaC1028H1580N262O310S10
Total Number of Atoms:3190


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    4845
Absorption 0.1% (=1 g/l)    0.212,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.195,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.86, 26.67, 18.57]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:80.6667
Grand average of hydropathicity (GRAVY):0.07