Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5990
Number of amino acids:441
Molecular Weight:50265.13 Da
Theoretical pI:5.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)163.63%
Cysteine CYS (C)92.04%
Glutamic Acid GLU (E)296.58%
Aspartic Acid ASP (D)184.08%
Glycine GLY (G)317.03%
Phynylalanine PHE (F)204.54%
Isoleucine ILE (I)327.26%
Histidine HIS (H)92.04%
Lysine LYS (K)245.44%
Methionine MET (M)81.81%
Leucine LEU (L)449.98%
Asparagine ASN (N)245.44%
Glutamine GLN (Q)173.85%
Proline PRO (P)255.67%
Serine SER (S)388.62%
Arginine ARG (R)153.4%
Threonine THR (T)286.35%
Tryptophan TRP (W)92.04%
Valine VAL (V)184.08%
Tyrosine TYR (Y)276.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2282
HydrogenH3468
NitrogenN578
OxygenO670
SulphurS17

FormulaC2282H3468N578O670S17
Total Number of Atoms:7015


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    90230
Absorption 0.1% (=1 g/l)    1.795,   assuming all pairs of CYS residues form cystines

Ext. coefficient    89730
Absorption 0.1% (=1 g/l)    1.785,   assuming all CYS residues are reduced
Aromaticity:0.127

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.15

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.01, 26.76, 22.00]

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:82.6757
Grand average of hydropathicity (GRAVY):-0.30