Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1406
Number of amino acids:255
Molecular Weight:26716.42 Da
Theoretical pI:6.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)249.41%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)31.18%
Aspartic Acid ASP (D)135.1%
Glycine GLY (G)2610.2%
Phynylalanine PHE (F)155.88%
Isoleucine ILE (I)62.35%
Histidine HIS (H)00%
Lysine LYS (K)93.53%
Methionine MET (M)62.35%
Leucine LEU (L)197.45%
Asparagine ASN (N)135.1%
Glutamine GLN (Q)72.75%
Proline PRO (P)2710.59%
Serine SER (S)176.67%
Arginine ARG (R)72.75%
Threonine THR (T)2710.59%
Tryptophan TRP (W)31.18%
Valine VAL (V)103.92%
Tyrosine TYR (Y)72.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1177
HydrogenH1802
NitrogenN308
OxygenO359
SulphurS22

FormulaC1177H1802N308O359S22
Total Number of Atoms:3668


Total number of positively charged residues (ARG + LYS):16
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27930
Absorption 0.1% (=1 g/l)    1.045,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.008,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.53, 32.55, 20.39]

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:59.0196
Grand average of hydropathicity (GRAVY):-0.05