Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3208
Number of amino acids:12
Molecular Weight:1129.35 Da
Theoretical pI:3.8


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)216.67%
Cysteine CYS (C)216.67%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)18.33%
Glycine GLY (G)216.67%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)325%
Asparagine ASN (N)00%
Glutamine GLN (Q)00%
Proline PRO (P)216.67%
Serine SER (S)00%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC48
HydrogenH80
NitrogenN12
OxygenO15
SulphurS2

FormulaC48H80N12O15S2
Total Number of Atoms:157


Total number of positively charged residues (ARG + LYS):0
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    125
Absorption 0.1% (=1 g/l)    0.111,   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:0.000

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 77.88

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 33.33, 41.67]

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:114.167
Grand average of hydropathicity (GRAVY):1.04