Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2494
Number of amino acids:9
Molecular Weight:1050.22 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)111.11%
Phynylalanine PHE (F)111.11%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)111.11%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)444.44%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)222.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC55
HydrogenH71
NitrogenN9
OxygenO12
SulphurS0

FormulaC55H71N9O12S0
Total Number of Atoms:147


Total number of positively charged residues (ARG + LYS):0
Total number of negatively charged residues (ASP + GLU):0
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    2980
Absorption 0.1% (=1 g/l)    2.837
Aromaticity:0.333

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 127.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[44.44, 55.56, 11.11]

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:43.3333
Grand average of hydropathicity (GRAVY):-0.31