Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4348
Number of amino acids:386
Molecular Weight:42612.54 Da
Theoretical pI:5.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)389.84%
Cysteine CYS (C)20.52%
Glutamic Acid GLU (E)246.22%
Aspartic Acid ASP (D)205.18%
Glycine GLY (G)225.7%
Phynylalanine PHE (F)184.66%
Isoleucine ILE (I)215.44%
Histidine HIS (H)82.07%
Lysine LYS (K)246.22%
Methionine MET (M)123.11%
Leucine LEU (L)4110.62%
Asparagine ASN (N)184.66%
Glutamine GLN (Q)133.37%
Proline PRO (P)164.15%
Serine SER (S)297.51%
Arginine ARG (R)112.85%
Threonine THR (T)328.29%
Tryptophan TRP (W)20.52%
Valine VAL (V)194.92%
Tyrosine TYR (Y)164.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1909
HydrogenH2992
NitrogenN492
OxygenO583
SulphurS14

FormulaC1909H2992N492O583S14
Total Number of Atoms:5990


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34965
Absorption 0.1% (=1 g/l)    0.821,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.818,   assuming all CYS residues are reduced
Aromaticity:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.31, 22.02, 29.79]

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:86.7618
Grand average of hydropathicity (GRAVY):-0.15