Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1707
Number of amino acids:30
Molecular Weight:3071.62 Da
Theoretical pI:5.96


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)620%
Glutamic Acid GLU (E)13.33%
Aspartic Acid ASP (D)00%
Glycine GLY (G)413.33%
Phynylalanine PHE (F)26.67%
Isoleucine ILE (I)13.33%
Histidine HIS (H)00%
Lysine LYS (K)13.33%
Methionine MET (M)00%
Leucine LEU (L)310%
Asparagine ASN (N)13.33%
Glutamine GLN (Q)00%
Proline PRO (P)310%
Serine SER (S)516.67%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)26.67%
Tyrosine TYR (Y)13.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC132
HydrogenH204
NitrogenN32
OxygenO40
SulphurS6

FormulaC132H204N32O40S6
Total Number of Atoms:414


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):1
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    1865
Absorption 0.1% (=1 g/l)    0.607,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.485,   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 : 50.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.00, 43.33, 13.33]

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:71.3333
Grand average of hydropathicity (GRAVY):0.74