Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2469
Number of amino acids:30
Molecular Weight:3303.7 Da
Theoretical pI:7.79


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)13.33%
Glycine GLY (G)310%
Phynylalanine PHE (F)310%
Isoleucine ILE (I)13.33%
Histidine HIS (H)13.33%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)13.33%
Glutamine GLN (Q)26.67%
Proline PRO (P)00%
Serine SER (S)413.33%
Arginine ARG (R)310%
Threonine THR (T)26.67%
Tryptophan TRP (W)00%
Valine VAL (V)13.33%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC132
HydrogenH204
NitrogenN44
OxygenO44
SulphurS6

FormulaC132H204N44O44S6
Total Number of Atoms:430


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    375
Absorption 0.1% (=1 g/l)    0.114,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.86

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.67, 26.67, 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:26
Grand average of hydropathicity (GRAVY):-0.20