Physicochemical Properties of Peptide



PPepDB ID:PPepDB_238
Number of amino acids:11
Molecular Weight:1309.46 Da
Theoretical pI:5.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)19.09%
Glutamic Acid GLU (E)19.09%
Aspartic Acid ASP (D)00%
Glycine GLY (G)19.09%
Phynylalanine PHE (F)19.09%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)19.09%
Glutamine GLN (Q)19.09%
Proline PRO (P)218.18%
Serine SER (S)00%
Arginine ARG (R)19.09%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)19.09%
Tyrosine TYR (Y)19.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC58
HydrogenH84
NitrogenN16
OxygenO17
SulphurS1

FormulaC58H84N16O17S1
Total Number of Atoms:176


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    1490
Absorption 0.1% (=1 g/l)    1.138,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    1.138,   assuming all CYS residues are reduced
Aromaticity:0.182

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 69.48

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.27, 36.36, 9.09]

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:26.3636
Grand average of hydropathicity (GRAVY):-0.94