Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1742
Number of amino acids:30
Molecular Weight:3147.77 Da
Theoretical pI:8.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.33%
Cysteine CYS (C)620%
Glutamic Acid GLU (E)13.33%
Aspartic Acid ASP (D)00%
Glycine GLY (G)310%
Phynylalanine PHE (F)13.33%
Isoleucine ILE (I)413.33%
Histidine HIS (H)00%
Lysine LYS (K)310%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)26.67%
Glutamine GLN (Q)00%
Proline PRO (P)26.67%
Serine SER (S)413.33%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)13.33%
Valine VAL (V)26.67%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC134
HydrogenH216
NitrogenN36
OxygenO39
SulphurS6

FormulaC134H216N36O39S6
Total Number of Atoms:431


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    5875
Absorption 0.1% (=1 g/l)    1.866,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.747,   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 : 29.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 36.67, 6.67]

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:74.6665
Grand average of hydropathicity (GRAVY):0.51