Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1753
Number of amino acids:30
Molecular Weight:3105.65 Da
Theoretical pI:8.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)620%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)516.67%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)413.33%
Histidine HIS (H)00%
Lysine LYS (K)13.33%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)26.67%
Glutamine GLN (Q)13.33%
Proline PRO (P)26.67%
Serine SER (S)413.33%
Arginine ARG (R)13.33%
Threonine THR (T)00%
Tryptophan TRP (W)13.33%
Valine VAL (V)26.67%
Tyrosine TYR (Y)13.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC129
HydrogenH206
NitrogenN38
OxygenO39
SulphurS6

FormulaC129H206N38O39S6
Total Number of Atoms:418


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    2.371,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    2.251,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 43.33, 0.00]

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:71.3332
Grand average of hydropathicity (GRAVY):0.40