Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5847
Number of amino acids:106
Molecular Weight:11588.76 Da
Theoretical pI:8.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1110.38%
Cysteine CYS (C)65.66%
Glutamic Acid GLU (E)32.83%
Aspartic Acid ASP (D)65.66%
Glycine GLY (G)54.72%
Phynylalanine PHE (F)43.77%
Isoleucine ILE (I)87.55%
Histidine HIS (H)00%
Lysine LYS (K)109.43%
Methionine MET (M)65.66%
Leucine LEU (L)76.6%
Asparagine ASN (N)32.83%
Glutamine GLN (Q)10.94%
Proline PRO (P)54.72%
Serine SER (S)76.6%
Arginine ARG (R)32.83%
Threonine THR (T)87.55%
Tryptophan TRP (W)00%
Valine VAL (V)87.55%
Tyrosine TYR (Y)54.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC514
HydrogenH833
NitrogenN129
OxygenO149
SulphurS12

FormulaC514H833N129O149S12
Total Number of Atoms:1637


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):9
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    7825
Absorption 0.1% (=1 g/l)    0.675,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.643,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.73

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.19, 18.87, 25.47]

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:87.4529
Grand average of hydropathicity (GRAVY):0.26