Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5917
Number of amino acids:85
Molecular Weight:9630.46 Da
Theoretical pI:9.36


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.35%
Cysteine CYS (C)89.41%
Glutamic Acid GLU (E)22.35%
Aspartic Acid ASP (D)44.71%
Glycine GLY (G)67.06%
Phynylalanine PHE (F)67.06%
Isoleucine ILE (I)33.53%
Histidine HIS (H)11.18%
Lysine LYS (K)1112.94%
Methionine MET (M)22.35%
Leucine LEU (L)67.06%
Asparagine ASN (N)00%
Glutamine GLN (Q)44.71%
Proline PRO (P)55.88%
Serine SER (S)55.88%
Arginine ARG (R)44.71%
Threonine THR (T)78.24%
Tryptophan TRP (W)11.18%
Valine VAL (V)67.06%
Tyrosine TYR (Y)22.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC429
HydrogenH685
NitrogenN115
OxygenO116
SulphurS10

FormulaC429H685N115O116S10
Total Number of Atoms:1355


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):6
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)    0.932,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.881,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.23

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.24, 18.82, 14.12]

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:64.1176
Grand average of hydropathicity (GRAVY):-0.19