Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1330
Number of amino acids:111
Molecular Weight:11744.65 Da
Theoretical pI:7.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1210.81%
Cysteine CYS (C)87.21%
Glutamic Acid GLU (E)54.5%
Aspartic Acid ASP (D)65.41%
Glycine GLY (G)1412.61%
Phynylalanine PHE (F)32.7%
Isoleucine ILE (I)54.5%
Histidine HIS (H)00%
Lysine LYS (K)65.41%
Methionine MET (M)65.41%
Leucine LEU (L)98.11%
Asparagine ASN (N)32.7%
Glutamine GLN (Q)43.6%
Proline PRO (P)43.6%
Serine SER (S)54.5%
Arginine ARG (R)65.41%
Threonine THR (T)76.31%
Tryptophan TRP (W)10.9%
Valine VAL (V)54.5%
Tyrosine TYR (Y)21.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC499
HydrogenH813
NitrogenN143
OxygenO155
SulphurS14

FormulaC499H813N143O155S14
Total Number of Atoms:1624


Total number of positively charged residues (ARG + LYS):12
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    8980
Absorption 0.1% (=1 g/l)    0.765,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.722,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.52, 23.42, 28.83]

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:73.063
Grand average of hydropathicity (GRAVY):0.01