Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2352
Number of amino acids:49
Molecular Weight:5374.18 Da
Theoretical pI:4.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)816.33%
Glutamic Acid GLU (E)36.12%
Aspartic Acid ASP (D)48.16%
Glycine GLY (G)36.12%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)510.2%
Histidine HIS (H)00%
Lysine LYS (K)24.08%
Methionine MET (M)00%
Leucine LEU (L)36.12%
Asparagine ASN (N)24.08%
Glutamine GLN (Q)00%
Proline PRO (P)36.12%
Serine SER (S)510.2%
Arginine ARG (R)36.12%
Threonine THR (T)36.12%
Tryptophan TRP (W)00%
Valine VAL (V)36.12%
Tyrosine TYR (Y)24.08%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC222
HydrogenH364
NitrogenN62
OxygenO76
SulphurS8

FormulaC222H364N62O76S8
Total Number of Atoms:732


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):7
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    3480
Absorption 0.1% (=1 g/l)    0.648,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.555,   assuming all CYS residues are reduced
Aromaticity:0.041

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 69.89

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.53, 26.53, 12.24]

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:81.4287
Grand average of hydropathicity (GRAVY):-0.02