Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4173
Number of amino acids:768
Molecular Weight:84459.67 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)395.08%
Cysteine CYS (C)91.17%
Glutamic Acid GLU (E)253.26%
Aspartic Acid ASP (D)354.56%
Glycine GLY (G)557.16%
Phynylalanine PHE (F)334.3%
Isoleucine ILE (I)405.21%
Histidine HIS (H)172.21%
Lysine LYS (K)324.17%
Methionine MET (M)162.08%
Leucine LEU (L)8511.07%
Asparagine ASN (N)384.95%
Glutamine GLN (Q)354.56%
Proline PRO (P)769.9%
Serine SER (S)8110.55%
Arginine ARG (R)395.08%
Threonine THR (T)374.82%
Tryptophan TRP (W)91.17%
Valine VAL (V)455.86%
Tyrosine TYR (Y)222.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3794
HydrogenH5941
NitrogenN1033
OxygenO1102
SulphurS25

FormulaC3794H5941N1033O1102S25
Total Number of Atoms:11895


Total number of positively charged residues (ARG + LYS):71
Total number of negatively charged residues (ASP + GLU):60
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    82780
Absorption 0.1% (=1 g/l)    0.980,   assuming all pairs of CYS residues form cystines

Ext. coefficient    82280
Absorption 0.1% (=1 g/l)    0.974,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.47, 32.55, 21.48]

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:85.5468
Grand average of hydropathicity (GRAVY):-0.24