Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5046
Number of amino acids:277
Molecular Weight:31562.67 Da
Theoretical pI:8.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.69%
Cysteine CYS (C)51.81%
Glutamic Acid GLU (E)124.33%
Aspartic Acid ASP (D)124.33%
Glycine GLY (G)248.66%
Phynylalanine PHE (F)196.86%
Isoleucine ILE (I)113.97%
Histidine HIS (H)82.89%
Lysine LYS (K)207.22%
Methionine MET (M)62.17%
Leucine LEU (L)176.14%
Asparagine ASN (N)145.05%
Glutamine GLN (Q)134.69%
Proline PRO (P)145.05%
Serine SER (S)238.3%
Arginine ARG (R)103.61%
Threonine THR (T)196.86%
Tryptophan TRP (W)93.25%
Valine VAL (V)155.42%
Tyrosine TYR (Y)134.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1434
HydrogenH2133
NitrogenN379
OxygenO408
SulphurS11

FormulaC1434H2133N379O408S11
Total Number of Atoms:4365


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    69120
Absorption 0.1% (=1 g/l)    2.190,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68870
Absorption 0.1% (=1 g/l)    2.182,   assuming all CYS residues are reduced
Aromaticity:0.148

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.26

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.32, 27.08, 17.33]

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:59.8195
Grand average of hydropathicity (GRAVY):-0.50