Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4861
Number of amino acids:79
Molecular Weight:8953.75 Da
Theoretical pI:9.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.27%
Cysteine CYS (C)810.13%
Glutamic Acid GLU (E)22.53%
Aspartic Acid ASP (D)33.8%
Glycine GLY (G)67.59%
Phynylalanine PHE (F)33.8%
Isoleucine ILE (I)67.59%
Histidine HIS (H)22.53%
Lysine LYS (K)911.39%
Methionine MET (M)33.8%
Leucine LEU (L)67.59%
Asparagine ASN (N)45.06%
Glutamine GLN (Q)22.53%
Proline PRO (P)33.8%
Serine SER (S)56.33%
Arginine ARG (R)45.06%
Threonine THR (T)22.53%
Tryptophan TRP (W)11.27%
Valine VAL (V)78.86%
Tyrosine TYR (Y)22.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC393
HydrogenH641
NitrogenN111
OxygenO105
SulphurS11

FormulaC393H641N111O105S11
Total Number of Atoms:1261


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):5
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)    1.003,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.947,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.39

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.65, 22.78, 15.19]

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:86.2026
Grand average of hydropathicity (GRAVY):0.01