Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6095
Number of amino acids:79
Molecular Weight:8491.02 Da
Theoretical pI:6.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)33.8%
Cysteine CYS (C)810.13%
Glutamic Acid GLU (E)22.53%
Aspartic Acid ASP (D)45.06%
Glycine GLY (G)78.86%
Phynylalanine PHE (F)33.8%
Isoleucine ILE (I)1113.92%
Histidine HIS (H)11.27%
Lysine LYS (K)33.8%
Methionine MET (M)33.8%
Leucine LEU (L)45.06%
Asparagine ASN (N)22.53%
Glutamine GLN (Q)22.53%
Proline PRO (P)56.33%
Serine SER (S)810.13%
Arginine ARG (R)33.8%
Threonine THR (T)45.06%
Tryptophan TRP (W)00%
Valine VAL (V)45.06%
Tyrosine TYR (Y)22.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC368
HydrogenH595
NitrogenN97
OxygenO110
SulphurS11

FormulaC368H595N97O110S11
Total Number of Atoms:1181


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):6
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    3480
Absorption 0.1% (=1 g/l)    0.410,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.351,   assuming all CYS residues are reduced
Aromaticity:0.063

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.38, 27.85, 15.19]

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:92.5318
Grand average of hydropathicity (GRAVY):0.44