Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6126
Number of amino acids:96
Molecular Weight:10925.9 Da
Theoretical pI:9.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.08%
Cysteine CYS (C)99.38%
Glutamic Acid GLU (E)22.08%
Aspartic Acid ASP (D)55.21%
Glycine GLY (G)88.33%
Phynylalanine PHE (F)55.21%
Isoleucine ILE (I)33.13%
Histidine HIS (H)44.17%
Lysine LYS (K)1313.54%
Methionine MET (M)44.17%
Leucine LEU (L)88.33%
Asparagine ASN (N)88.33%
Glutamine GLN (Q)11.04%
Proline PRO (P)55.21%
Serine SER (S)33.13%
Arginine ARG (R)44.17%
Threonine THR (T)55.21%
Tryptophan TRP (W)11.04%
Valine VAL (V)44.17%
Tyrosine TYR (Y)22.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC476
HydrogenH759
NitrogenN139
OxygenO130
SulphurS13

FormulaC476H759N139O130S13
Total Number of Atoms:1517


Total number of positively charged residues (ARG + LYS):17
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.822,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.776,   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 : 20.51

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.96, 25.00, 16.67]

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:58.8542
Grand average of hydropathicity (GRAVY):-0.52