Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3443
Number of amino acids:30
Molecular Weight:3284.86 Da
Theoretical pI:8.43


Amino Acid Composition:


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


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC147
HydrogenH247
NitrogenN37
OxygenO45
SulphurS1

FormulaC147H247N37O45S1
Total Number of Atoms:477


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    1490
Absorption 0.1% (=1 g/l)    0.454
Aromaticity:0.033

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 6.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 36.67, 33.33]

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:113.667
Grand average of hydropathicity (GRAVY):-0.12