Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3231
Number of amino acids:29
Molecular Weight:3061.62 Da
Theoretical pI:8.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.45%
Cysteine CYS (C)517.24%
Glutamic Acid GLU (E)13.45%
Aspartic Acid ASP (D)00%
Glycine GLY (G)310.34%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)413.79%
Histidine HIS (H)00%
Lysine LYS (K)26.9%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)13.45%
Glutamine GLN (Q)00%
Proline PRO (P)26.9%
Serine SER (S)517.24%
Arginine ARG (R)13.45%
Threonine THR (T)00%
Tryptophan TRP (W)13.45%
Valine VAL (V)26.9%
Tyrosine TYR (Y)13.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC130
HydrogenH210
NitrogenN36
OxygenO39
SulphurS5

FormulaC130H210N36O39S5
Total Number of Atoms:420


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7240
Absorption 0.1% (=1 g/l)    2.365,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    2.283,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.59, 37.93, 6.90]

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:77.2414
Grand average of hydropathicity (GRAVY):0.37