Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5577
Number of amino acids:194
Molecular Weight:19900.12 Da
Theoretical pI:6.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.7%
Cysteine CYS (C)94.64%
Glutamic Acid GLU (E)21.03%
Aspartic Acid ASP (D)73.61%
Glycine GLY (G)2311.86%
Phynylalanine PHE (F)84.12%
Isoleucine ILE (I)21.03%
Histidine HIS (H)31.55%
Lysine LYS (K)73.61%
Methionine MET (M)42.06%
Leucine LEU (L)199.79%
Asparagine ASN (N)147.22%
Glutamine GLN (Q)31.55%
Proline PRO (P)126.19%
Serine SER (S)2713.92%
Arginine ARG (R)10.52%
Threonine THR (T)2412.37%
Tryptophan TRP (W)10.52%
Valine VAL (V)73.61%
Tyrosine TYR (Y)84.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC860
HydrogenH1326
NitrogenN228
OxygenO289
SulphurS13

FormulaC860H1326N228O289S13
Total Number of Atoms:2716


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17920
Absorption 0.1% (=1 g/l)    0.900,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.875,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.20, 39.18, 19.59]

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:59.3814
Grand average of hydropathicity (GRAVY):-0.12