Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1430
Number of amino acids:106
Molecular Weight:11187.23 Da
Theoretical pI:5.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)109.43%
Cysteine CYS (C)87.55%
Glutamic Acid GLU (E)87.55%
Aspartic Acid ASP (D)32.83%
Glycine GLY (G)98.49%
Phynylalanine PHE (F)32.83%
Isoleucine ILE (I)10.94%
Histidine HIS (H)00%
Lysine LYS (K)76.6%
Methionine MET (M)54.72%
Leucine LEU (L)1615.09%
Asparagine ASN (N)43.77%
Glutamine GLN (Q)21.89%
Proline PRO (P)43.77%
Serine SER (S)65.66%
Arginine ARG (R)21.89%
Threonine THR (T)87.55%
Tryptophan TRP (W)10.94%
Valine VAL (V)98.49%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC484
HydrogenH802
NitrogenN126
OxygenO149
SulphurS13

FormulaC484H802N126O149S13
Total Number of Atoms:1574


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6000
Absorption 0.1% (=1 g/l)    0.536,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.492,   assuming all CYS residues are reduced
Aromaticity:0.038

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.54

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.30, 21.70, 36.79]

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:96.6036
Grand average of hydropathicity (GRAVY):0.40